Security Advisory

Security Advisory

Chrome Security Update Fixed Active Zero-Day Exploit & Multiple High-Severity Vulnerabilities 

Security advisory : Google has issued a Stable Channel Update for Chrome to address 4 high-severity vulnerabilities, including one zero-day vulnerability (CVE-2025-10585) actively exploited in the wild.

OEM Google 
Severity High 
CVSS Score N/A 
CVEs CVE-2025-10585, CVE-2025-10500, CVE-2025-10501, CVE-2025-10502 
POC Available No 
Actively Exploited Yes 
Exploited in Wild Yes 
Advisory Version 1.0 

Overview 

This flaw, a Type Confusion in the V8 JavaScript and WebAssembly engine, can allow remote attackers to execute arbitrary code outside of Chrome’s security sandbox when users visit maliciously crafted web pages. Users and administrators are urged to update to the latest Chrome version immediately to mitigate potential exploitation 

Vulnerability Name CVE ID Product Affected Severity Fixed Version 
​ Type Confusion in V8 Engine  CVE-2025-10585 Chrome (Windows, Mac, Linux)  High  140.0.7339.185/.186 

Technical Summary 

The zero-day vulnerability in Chrome’s V8 engine arises from a type of confusion flaw, where object types are misinterpreted, leading to logical errors and memory corruption.

Attackers can exploit this issue when users visit maliciously crafted websites, enabling arbitrary code execution and possible sandbox escape.

This flaw has been confirmed as actively exploited in the wild. In addition to this zero-day, the update also fixes three other high-severity issues, a use-after-free in the Dawn graphics abstraction layer that could lead to memory corruption, a use-after-free in WebRTC that may enable remote code execution, and a heap buffer overflow in ANGLE that could result in program crashes or arbitrary code execution. 

CVE ID System Affected  Vulnerability Details Impact 
CVE-2025-10585 Google Chrome (Windows, Mac, Linux) Type confusion in the V8 JavaScript engine could allow memory corruption, arbitrary code execution, and potential sandbox escape Remote Code Execution / Sandbox Escape 

Other Vulnerabilities  

In addition to the zero-day, Google patched three other high-severity vulnerabilities in the same stable channel release. 

Vulnerability Name CVE ID Affected Component Severity 
​Use-after-free in Dawn CVE-2025-10500 Chrome GPU Renderer Component (Dawn)  High 
Use-after-free in WebRTC CVE-2025-10501 Chrome WebRTC Audio/Video Communication Module High 
Heap Buffer Overflow in ANGLE CVE-2025-10502 Chrome Graphics Translation Engine (ANGLE) High 

Recommendations: 

Update Chrome immediately to the following versions: 

  • Windows/Mac: Chrome 140.0.7339.185/.186 
  • Linux: Chrome 140.0.7339.185 

Here are some Recommendations below 

  • Manual Update Check: Navigate to “Settings → Help → About Google Chrome” to trigger the update. 
  • Patch Management: Ensure enterprise update policies enforce Chrome auto-updates. 
  • Threat Monitoring: Keep monitoring logs for any signs of exploitation 

Conclusion: 
There are high vulnerabilities in Google Chrome, including an actively exploited zero-day flaw in the V8 JavaScript engine that poses a significant risk of remote code execution and sandbox escape.

Given the severity and confirmed exploitation in the wild, it is imperative that all users and administrators promptly update to the latest Chrome versions to mitigate potential attacks. Immediate action is essential to safeguard systems, data, and user privacy in light of these emerging threats. 

References: 

  • https://cybersecuritynews.com/google-chrome-0-day-vulnerability-exploited/  

Security Advisory

Jenkins Security Patch Fixed HTTP/2 DoS and Permission Issues  

Security advisory: Jenkins addressed critical security flaws in its built-in HTTP server related to the handling of HTTP/2 connections, where attackers could overwhelm servers causing denial of service. This mainly impacts Jenkins instances running with HTTP/2 enabled, which is not the default setting.

Severity High 
CVSS Score 7.7 
CVEs CVE-2025-5115, CVE-2025-59474, CVE-2025-59475, CVE-2025-59476 
POC Available No 
Actively Exploited No 
Exploited in Wild No 
Advisory Version 1.0 

Overview 

Jenkins, a popular open-source automation server used for building and deploying software, recently patched several high & medium security flaws.

The high severity issue is a Denial-of-Service (DoS) vulnerability that could allow attackers to overwhelm the server and make it stop working properly even without needing to log in.

Other issues included the risk of unauthorized users viewing sensitive configuration information and the possibility of attackers inserting fake log entries to confuse system administrators. Jenkins released updates to fix these issues and strongly recommends users upgrade to the latest versions to stay protected. 

                Vulnerability Name CVE ID Product Affected Severity Fixed Version 
HTTP/2 Denial of Service in bundled Jetty  CVE-2025-5115 Jenkins (bundled Jetty)  High Weekly 2.524+, LTS 2.516.3+ 
Missing permission check – agent names CVE-2025-59474 Jenkins core Medium Weekly 2.528+, LTS 2.516.3+ 
Missing permission check – user profile menu CVE-2025-59475 Jenkins core Medium Weekly 2.528+, LTS 2.516.3+ 
Log Message Injection Vulnerability CVE-2025-59476 Jenkins core Medium Weekly 2.528+, LTS 2.516.3+ 

Technical Summary 

Additionally, permission checks in some user interface areas were incomplete, allowing unauthorized users to access sensitive information such as agent names and configuration details.

There was also a vulnerability in log message processing that could let attackers insert misleading entries to confuse administrators. All the issues are fixed in Jenkins latest version. 

CVE ID System Affected  Vulnerability Details Impact 
CVE-2025-5115 Jenkins instances with embedded Jetty server with HTTP/2 enabled It causes the Jetty server to repeatedly reset HTTP/2 streams (RST_STREAM) in response to malicious or malformed frames, leading to resource exhaustion and potential denial of service.  Denial of service 
CVE-2025-59474 Jenkins automation server Permission check flaw allowing unauthorized users to view Jenkins agent/executor names via the side panel executor’s widget Information Disclosure 
CVE-2025-59475 Jenkins automation server Permission check flaw allowing authenticated users without Overall/Read permission to view sensitive configuration details via the Jenkins user profile dropdown menu. Information Disclosure 
CVE-2025-59476 Jenkins automation server An attacker can inject line breaks into Jenkins log messages, leading to forged or misleading log entries. Misleading administrators 

Remediation: 

  • Users should immediately install the latest, patched version of Jenkins on all servers: 
  • Weekly Release: Update to Jenkins v2.528 or later. 
  • Long-Term Support (LTS): Update to Jenkins v2.516.3 or later 

Here are some recommendations below. 

  • If immediate upgrade is not possible, users should disable HTTP/2 to mitigate the Denial-of-Service vulnerability. 
  • Always keep Jenkins core and plugins up to date with the latest security patches. 
  • Regularly audit and monitor access logs and system activity 
     

Conclusion: 
These security flaws could seriously impact Jenkins users, especially those relying on it for continuous integration and deployment. The DoS vulnerability is particularly dangerous because it can be triggered by anyone over the internet, even if they don’t have an account.

Enterprise admins & users should upgrade immediately to the patched versions or disable HTTP/2 to reduce the risk. Keeping Jenkins up to date and following good security practices along with restricting user permissions and monitoring logs is essential to prevent attacks and maintain the stability and safety of software delivery pipelines. 

References: 

Blogs Security Advisory

Shai-Hulud NPM Supply Chain Attack Expands to 470+ Packages 

Summary: A large-scale malicious campaign, nicknamed the Shai-Hulud attack, has impacted the npm ecosystem with over 500 trojanized packages, including those packages maintained by CrowdStrike. The attack originated from a sophisticated phishing campaign that exploited the fundamental trust relationships within the npm ecosystem. 

The JavaScript ecosystem is under a massive threat following a major supply chain attack. Hence, millions of crypto users and developers are now at risk. With more than a billion of these packages downloaded already, thousands of blockchain wallets and applications could be suffer varying exploits.

  • Malicious NPM updates spread malware that steals and replaces crypto addresses.
  • Developers encouraged developer to cease on-chain operation and inspect HD wallets thoroughly.

The attackers injected malicious scripts that

  • Run secret-scanning tools on developer systems, 
  • Steal GitHub, npm and cloud credentials, 
  • Insert persistent GitHub Actions workflows for long-term access, and 
  • Exfiltrate sensitive data to attacker-controlled endpoints. 

This attack is ongoing and all users of npm packages should take immediate steps to secure tokens, audit their environments and verify package integrity. 

Issue Details 

Initial discovery on September 14, 2025, when suspicious versions of @ctrl/tinycolor and ~40 other packages were flagged. By September 16, the attack had spread to include CrowdStrike-namespaced packages and dozens from @ctrl, @nativescript-community, rxnt, @operato, and others. 

Malware behavior 

  • Downloads and runs TruffleHog, a legitimate secret scanner. 
  • Harvests secrets from local machines and CI/CD agents (npm tokens, GitHub PATs, AWS/GCP cloud keys). 
  • Writes malicious workflows into .github/workflows (shai-hulud-workflow.yml). 
  • Continuously exfiltrates findings to a fixed webhook endpoint or pushes them into new GitHub repos under the victim’s account. 

Attack Flow 

Here are some popular packages with affected versions 

Package Version 
@ctrl/ngx-codemirror 7.0.1, 7.0.2 
@ctrl/tinycolor 4.1.1, 4.1.2 
@crowdstrike/foundry-js 0.19.1, 0.19.2 
@crowdstrike/logscale-dashboard 1.205.1, 1.205.2 
@nativescript-community/sqlite 3.5.2 – 3.5.5 
@nativescript-community/text 1.6.9 – 1.6.13 
@nstudio/nativescript-checkbox 2.0.6 – 2.0.9 
@nstudio/angular 20.0.4 – 20.0.6 
eslint-config-crowdstrike 11.0.2, 11.0.3 
remark-preset-lint-crowdstrike 4.0.1, 4.0.2 

Attack Indicators 

Malicious Workflow Filenames 

  • .github/workflows/shai-hulud-workflow.yml 
  • .github/workflows/shai-hulud.yaml 

Exfiltration Endpoint 

  • hxxps://webhook[.]site/bb8ca5f6-4175-45d2-b042-fc9ebb8170b7 

Hashes of Malicious Payloads 

SHA-256 Hash Notes 
46faab8ab153fae6e80e7cca38eab363075bb524edd79e42269217a083628f09 Large batch, Sept 15–16 
b74caeaa75e077c99f7d44f46daaf9796a3be43ecf24f2a1fd381844669da777 CrowdStrike-related packages burst (Sept 16) 
de0e25a3e6c1e1e5998b306b7141b3dc4c0088da9d7bb47c1c00c91e6e4f85d6 First observed compromise (Sept 14) 
81d2a004a1bca6ef87a1caf7d0e0b355ad1764238e40ff6d1b1cb77ad4f595c3 Sept 14 small burst 
83a650ce44b2a9854802a7fb4c202877815274c129af49e6c2d1d5d5d55c501e ~25 packages, Sept 14 
4b2399646573bb737c4969563303d8ee2e9ddbd1b271f1ca9e35ea78062538db Burst of ~17 packages, Sept 14–15 
dc67467a39b70d1cd4c1f7f7a459b35058163592f4a9e8fb4dffcbba98ef210c Multiple reuse across Sept 15–16 

Recommendations: 

Organizations and developers using npm should take immediate actions: 

  1. Uninstall or downgrade 
    Pin dependencies to known-safe versions until patched releases are confirmed. 
  1. Rotate credentials 
    Immediately revoke and reissue: 
  • npm access tokens 
  • GitHub personal access tokens / org tokens 
  • Cloud credentials (AWS, GCP, Azure) 
  1. Audit systems 
  • Inspect developer machines and CI/CD build agents for signs of the malicious bundle.js. 
  • Check .github/workflows for unauthorized files named “shai-hulud-*”. 
  • Review repositories for suspicious commits or new repos labeled “Shai-Hulud Migration”. 
  1. Monitor and log 
  • Search event logs for unusual npm publish activity. 
  • Investigate GitHub Actions runs designed to exfiltrate secrets. 
  1. Harden pipelines 
  • Pin package versions and use integrity checks (e.g.- lockfiles, checksums). 
  • Limit exposure of sensitive tokens in build environments. 
  • Rotate all build-related secrets regularly. 

 
Conclusion 
This incident is significant compromises in the npm ecosystem, impacting hundreds of widely used packages across various namespaces.

The attackers’ tactics such as credential theft, manipulation of GitHub workflows, and widespread package propagation, highlighting the growing sophistication of modern supply chain attacks.

Developers and organizations are strongly advised to take immediate action by removing affected package versions, rotating any exposed secrets, auditing their build environments and strengthening CI/CD security. Continuous monitoring and rapid response are essential to reducing risk and maintaining trust in open-source software. 

The attack’s browser API-level operation revealed critical blind spots in enterprise security monitoring, particularly for organizations handling cryptocurrency transactions.

References: 

Security Advisory

Spring Security & Framework Authorization Bypass Vulnerabilities Patched 

Security advisory: Two new security vulnerabilities have been discovered in the Spring Framework and Spring Security components identified as CVE-2025-41248 and CVE-2025-41249.

Severity Medium 
CVSS Score 4.4 
CVEs CVE-2025-41248, CVE-2025-41249 
POC Available No 
Actively Exploited No 
Exploited in Wild No 
Advisory Version 1.0 

Overview 

These issues affect applications that use method-level security annotations like @PreAuthorize to control access to certain methods or features. Under specific conditions when generics are used in parent classes or interfaces, these annotations may not be properly detected, which could allow unauthorized users to access restricted functionality. 

                Vulnerability Name CVE ID Product Affected Severity Fixed Version 
Spring Security Authorization Bypass Vulnerability  CVE-2025-41248 Spring Security  Medium 6.5.4 (Open Source) 6.4.10 (Open Source)  
Spring Framework Annotation Detection Vulnerability CVE-2025-41249 Spring Framework Medium 6.2.11 (Open Source) 6.1.23 (Commercial Support) 5.3.45 (Commercial Support)  

Technical Summary 

The vulnerability arises when Spring applications use inheritance (where a class inherits methods from another class) and generics (a way to define methods or classes that can handle different types of data) together. If a secured method, like one marked with the @PreAuthorize annotation (used to enforce security checks), is declared in a generic superclass or interface without clear type definitions, Spring might fail to recognize the security annotation at runtime. This means unauthorized users could potentially access these methods. This issue affects Spring Security versions 6.4.0 to 6.5.3 and Spring Framework versions 5.3.0 to 6.2.10. The Spring team has since released updates to better handle security annotations in such cases, ensuring proper authorization checks. 

CVE ID System Affected  Vulnerability Details Impact 
CVE-2025-41248 Spring Security 6.4.0 – 6.4.9 6.5.0 – 6.5.3 Spring Security may fail to detect method-level security annotations applied to generic superclasses or interfaces, resulting in unauthorized access. Unauthorized access  
CVE-2025-41249 Spring Framework 6.2.0 – 6.2.10 6.1.0 – 6.1.22 5.3.0 – 5.3.44 Older, unsupported versions are also affected.  Spring Framework does not consistently recognize security annotations on methods declared in generic superclasses or interfaces, which can lead to authorization bypass. Authorization bypass. 

Remediation: 

Users should immediately update to the latest patched versions of Spring Security and Spring Framework: 

Spring Security 
Affected Version Fix Version 
6.5.x 6.5.4 
6.4.x 6.4.10 
Spring Framework 
Affected Version Fix Version 
6.2.x 6.2.11 
6.1.x 6.1.23 
6.0.x N/A (OOS) 
5.3.x 5.3.45 

Conclusion: 
These vulnerabilities cause Spring Security and Spring Framework to sometimes miss detecting method-level security annotations in generic type hierarchies. This can allow unauthorized users to bypass authorization checks, exposing protected functionality. While the severity is medium, it is important to update to the fixed versions promptly and review security annotation usage on generics to maintain proper access control. 

References: 

 

Security Advisory

VoidProxy PhaaS Uses MFA Bypass, Hijacking Google & Microsoft Logins

Security Advisory

Security researchers from Okta have uncovered a stealthy and sophisticated Phishing-as-a-Service (PhaaS) framework known as VoidProxy.

This has been used to hijack Microsoft, Google and even integrated SSO accounts protected by providers like Okta. Unlike traditional phishing kits, VoidProxy employs Adversary-in-the-Middle (AiTM) tactics to capture real-time credentials, MFA tokens and bypassing several standard authentication protections.

VoidProxy’s infrastructure leverages disposable domains, Cloudflare protections, dynamic DNS which all of mimicking as legitimate enterprise setups becoming extremely difficult to detect, analyze. The attackers are running phishing campaigns with little technical effort, enabling wide-scale compromises that lead to email compromise, fraud and data breaches.

Its attack chain is built to evade modern email security, identity defenses, and analysis tools by leveraging the following:

  • CAPTCHA Filtering: Victims are first shown a CAPTCHA challenge before any phishing content loads. This helps block bots and automated security scanners.
  • Cloudflare Workers: Used to deliver customized phishing pages and smartly direct traffic to the attacker’s backend servers.
  • URL Redirection Chains: The phishing links in emails go through several redirects (often using shortened URLs) before landing on fake login pages. This helps bypass spam filters and security tools.
  • Dynamic DNS: These services let attackers quickly create domain names that point to specific IP addresses, making their infrastructure flexible and harder to track.    

Once a user enters their credentials and MFA tokens, the session is hijacked via a reverse proxy server, allowing the attacker to immediately access the legitimate account.

Here are some shortened url links

Attack Flow

StepDescription
1. DeliveryPhishing emails are sent from compromised accounts on email delivery services (like Postmarkapp or Constant Contact) increasing trust and shortening URL services for bypassing spam filters.
2. Redirecting & FilterClicking the phishing link redirects victims through several short URLs and presents a Cloudflare captcha to ensure human interaction.
3. PhishingVictims land on a fake Microsoft or Google login page using realistic subdomain patterns like “login.<phishing_domain>.<.com/.io>”. Additionally, integrated SSO accounts are redirected to additional fake SSO pages mimicking the login flows.
4. AiTM Session HijackThe backend proxy captures credentials, MFA tokens and session cookies, allowing attackers full account access.
5. ExfiltrationSession cookies and credentials are routed to the attacker’s admin panel in real-time. Integration with bots or webhooks enables instant alerts to the attackers.

Why It’s Effective

AiTM Infrastructure: Unlike static phishing kits, VoidProxy runs a live proxy in the middle of the authentication flow, stealing session tokens or mfa token immediately after login.

CAPTCHA & Cloudflare Layers: These challenges ensure only real human victims reach the phishing payload, filtering out scanners and sandboxes.

Integrated SSO Targeting: Accounts using Okta or other SSO providers are redirected to accurate second-stage phishing pages, increasing the likelihood of a full compromise.

Recommendations:

Here are some recommendations below

  • Harden the authentication by bind sessions to IP addresses (IP Session Binding) to block cookie replay attacks.
  • Block access from rarely used IP ranges or unmanaged devices.
  • Provide user awareness training to help recognize phishing links, suspicious email senders and fake login prompts.
  • Keep monitoring for any indications of suspicious activities.

Conclusion
VoidProxy’s layered architecture, real-time session hijacking and deep evasion mechanisms make it a potential threat even for environments with multi-factor authentication in place. We require a shift from traditional phishing detection toward real-time risk-based access controls, strong authenticators and persistent user education.

References:

Security Advisory

Angular SSR Vulnerability Allows Cross-Request Data Exposure (CVE-2025-59052) 

Security Advisory: A high security flaw was discovered in Angular’s server-side rendering (SSR) functionality that could lead to cross-request data leakage due to a global race condition. This is identified as CVE-2025-59052, affects multiple versions of Angular’s @angular/platform-server, @angular/ssr and @nguniversal/common packages.

With data breaches at highest, Organizations using vulnerable Angular versions should update immediately or implement recommended workarounds to avoid potential data breaches.

Severity High 
CVSS Score 7.1 
CVEs CVE-2025-59052 
POC Available No 
Actively Exploited No 
Exploited in Wild No 
Advisory Version 1.0 

Overview 

Angular is a popular open-source web application framework developed by Google, used to build dynamic, single-page applications (SPAs) and server-rendered apps using HTML, TypeScript and JavaScript.

When multiple SSR requests are processed concurrently, sensitive state information may be inadvertently shared, potentially exposing user tokens or private data across unrelated sessions. The Angular has released patches across all active branches and urges developers to update immediately. 

Vulnerability Name CVE ID Product Affected Severity Fixed Version 
​ Race condition vulnerability  CVE-2025-59052 Angular platform-server, ssr  High  v18.2.14, v19.2.15/16, v20.3.0, v21.0.0-next.3 

Technical Summary 

Angular uses a dependency injection (DI) container called the platform injector during SSR to hold request-specific data. This container was implemented as a global module-scoped variable, introducing a race condition when multiple requests were processed simultaneously.

This flaw could cause data meant for one user to be sent in the response to another, potentially leaking authentication tokens, headers, or private content.

Affected APIs include bootstrapApplication,  getPlatform, destroyPlatform. These changes introduce SSR-only breaking changes, with automatic migration schematics available through the Angular CLI update process. 

CVE ID System Affected  Vulnerability Details Impact 
CVE-2025-59052 Angular SSR v16 to v21 Race condition in global DI container during SSR could leak user data across requests Cross-Request Data Leakage 

Recommendations: 

Upgrade Angular packages to the latest patched versions: 

Package Affected Versions Fixed Versions 
@angular/platform-server >=16.0.0-next.0 <18.2.14 
>=19.0.0-next.0 <19.2.15 
>=20.0.0-next.0 <20.3.0 
>=21.0.0-next.0 <21.0.0-next.3 		18.2.14 
19.2.15 
20.3.0 
21.0.0-next.3 
@angular/ssr >=17.0.0-next.0 <18.2.21 
>=19.0.0-next.0 <19.2.16 
>=20.0.0-next.0 <20.3.0 
>=21.0.0-next.0 <21.0.0-next.3 		18.2.21 
19.2.16 
20.3.0 
21.0.0-next.3 

If Immediate Upgrade is Not Possible, you can follow the recommendations below 

  • Disable SSR via server routes or build configurations 
  • Remove asynchronous behavior from custom bootstrap functions 
  • Eliminate use of getPlatform() in server-side code 
  • Ensure ngJitMode is set to false in production builds 

Conclusion: 
The Angular SSR vulnerability CVE-2025-59052 is the high severity issue with global state management during concurrent request processing, resulting in potential cross-request data exposure.

Though not yet exploited in the wild, the risk is significant for SSR-enabled Angular apps. Developers are urged to apply updates promptly or follow the provided mitigation steps to secure their applications. 

As per reports this vulnerability requires no special privileges or user interaction, making it both easy to exploit and dangerous in high-traffic applications.

References: 

Hashtags 

#Infosec #CyberSecurity #Angular #SecurityAdvisory #WebSecurity #Vulnerabilitymanagement #DevSecOps #PatchManagement #CISO #CXO #Intrucept 

Security Advisory

Microsoft Patch Tuesday has 86 Fixes, 2-0Day Vulnerabilities

September 2025 Patch Tuesday update, addressing 86 security issues in products like Microsoft Windows, Microsoft Office etc.

This includes two publicly known zero-day bugs in the Windows SMB Server and another in Newtonsoft.Json. Here are the CVE addressed for Microsoft & non-Microsoft.

Organizations are strongly encouraged to prioritize patching of systems tied to network services, virtualization and productivity tools to mitigate risks of exploitation. 

OEM Microsoft 
Severity Critical 
Date of Announcement 2025-09-09 
No. of Patches 86 
Actively Exploited No 
Exploited in Wild No 
Advisory Version 1.0 

Overview 

Here are the CVE addressed for Microsoft & non-Microsoft 

  • 81 Microsoft CVEs addressed 
  • 5 non-Microsoft CVEs addressed 

Breakdown of September 2025 Vulnerabilities 

  • 41 Elevation of Privilege (EoP) 
  • 22 Remote Code Execution (RCE) 
  • 16 Information Disclosure 
  • 4 Denial of Service (DoS) 
  • 2 Security Feature Bypass 
  • 1 Spoofing  
Vulnerability Name CVE ID Product Affected Severity CVSS Score 
Windows SMB Elevation of Privilege Vulnerability  CVE-2025-55234 Windows Server, Windows 10, 11  High 8.8 
Improper Handling of Exceptional Conditions in Newtonsoft.Json CVE-2024-21907 Microsoft SQL Server High 7.5 

Technical Summary 

September 2025 Patch Tuesday includes security updates addressing denial-of-service and privilege escalation vulnerabilities in commonly used libraries and services.

One of the publicly disclosed zero-day CVE-2024-21907 affects the popular .NET library Newtonsoft.Json, where deserialization of crafted JSON can lead to application crashes.

Additionally, CVE-2025-55234 highlights a potential for relay attacks in SMB Server configurations that lack hardening measures such as signing and Extended Protection for Authentication (EPA). Microsoft advises assessing current SMB deployments using new audit capabilities introduced in this month’s updates. 

CVE ID System Affected  Vulnerability Details Impact 
 CVE-2025-55234 Microsoft SMB Server Lack of hardening (signing & EPA) in SMB Server can allow attackers to perform relay attacks, potentially resulting in elevation of privilege. Privilege Escalation 
CVE-2024-21907 Newtonsoft.Json < 13.0.1 Improper handling of crafted input to JsonConvert.DeserializeObject may trigger a StackOverflowException, leading to a denial-of-service condition. Denial of Service 

Source: Microsoft and NVD 

In addition to the publicly disclosed zero day vulnerability, several other Critical & High severity issues were addressed 

  • CVE‑2025‑55232: Microsoft High Performance Compute Pack (HPC), deserialization of untrusted data vulnerability enabling unauthorized remote code execution over a network interface. 
  • CVE‑2025‑54918: Windows NTLM, improper authentication vulnerability that enables elevation of privilege over a network, with potential for lateral movement across enterprise systems. 
  • CVE‑2025‑54110: Windows Kernel, integer overflow vulnerability allowing local privilege escalation through exploitation of kernel memory operations. 
  • CVE‑2025‑54098: Windows Hyper-V, improper access control flaw permitting local privilege escalation from guest to host in virtualized environments. 
  • CVE‑2025‑54916: Windows NTFS, stack-based buffer overflow vulnerability enabling local attackers to execute arbitrary code with elevated privileges. 

Key Affected Products and Services 

The September 2025 security updates address critical and important vulnerabilities across a broad range of Microsoft products and services: 

  • Windows Core and Security Components 

Includes updates for Windows Kernel, NTFS, TCP/IP, Defender Firewall, LSASS, BitLocker, NTLM, Win32K, and RRAS (Routing and Remote Access Service), with several vulnerabilities rated CVSS 8.8 or higher. 

  • Microsoft Office Suite 

Patches released for Excel, Word, PowerPoint, Visio, and SharePoint addressing RCE and information disclosure issues, especially through Preview Pane vectors. 

  • Azure and Cloud Services 

Fixes affect Azure Virtual Machine Agent, Azure Arc, and High-Performance Compute Pack (HPC). 

  • Virtualization and Hyper-V 

Multiple vulnerabilities in Hyper‑V and Virtual Hard Drive components, including privilege escalation and denial-of-service risks. 

  • Developer and Management Tools 

Patches applied to PowerShell, AutoZone, Windows Management Services and Capability Access Management, addressing local privilege escalation. 

  • Communication & File Services 

Updates cover SMB, SMBv3, MSMQ and Connected Devices Platform, with critical RCE and lateral movement vectors in enterprise environments. 

  • Browsers and Web Technologies 

Microsoft Edge (Chromium-based) updates, along with republished Chrome CVEs for continued coverage of known browser threats. 

Remediation: 

Apply Patches Promptly: Install the September 2025 security updates immediately to mitigate risks. 

Conclusion: 
Microsoft’s September 2025 Patch Tuesday addresses 86 vulnerabilities, including several critical and high rated issues across Windows, Office, Hyper-V and Azure components etc.

Notably, multiple flaws affect Windows Routing and Remote Access Service (RRAS), SQL Server, and Microsoft High Performance Compute Pack (HPC), with potential for remote code execution (RCE) and privilege escalation.

Microsoft fixed an elevation of privileges flaw in SMB Server that is exploited through relay attacks.

“SMB Server might be susceptible to relay attacks depending on the configuration. An attacker who successfully exploited these vulnerabilities could perform relay attacks and make the users subject to elevation of privilege attacks,” explains Microsoft.

References: 

Security Advisory

Vulnerability in Spring Cloud Gateway Server WebFlux Discovered; Target of Ease by Attackers

Security Advisory: CVE-2025-41243, A critical vulnerability has been disclosed in Spring Cloud Gateway Server WebFlux. This vulnerability allows attackers to modify sensitive Spring Environment properties under specific configurations.

Severity Critical 
CVSS Score 10.0 
CVEs CVE-2025-41243 
POC Available No 
Actively Exploited No 
Exploited in Wild No 
Advisory Version 1.0 

Overview 

The vulnerability has been assigned the maximum CVSS score of 10.0. It arises when actuator endpoints are exposed without proper security controls, potentially allowing attackers to compromise application behavior. Organizations and users of affected versions are strongly urged to upgrade to the fixed releases. 

Vulnerability Name CVE ID Product Affected Severity Fixed Version 
Spring Expression Language Property Modification  CVE-2025-41243  Spring Cloud Gateway WebFlux  Critical   v4.3.1,  
v4.2.5, v4.1.11, v3.1.11  

Technical Summary 

CVE-2025-41243 is a critical vulnerability occurs when the Spring Boot actuator is included as a dependency and the gateway actuator endpoint is explicitly exposed via the “management.endpoints.web.exposure.include=gateway” configuration.

In such cases, if actuator endpoints are unsecured or exposed to public networks, an attacker could exploit them to modify Spring Environment properties at runtime. This could cause unauthorized access, configuration tampering, and potential application compromise. 

CVE ID System Affected  Vulnerability Details Impact 
CVE-2025-41243    4.3.0 – 4.3.x 4.2.0 – 4.2.x 4.1.0 – 4.1.x 4.0.0 – 4.0.x 3.1.0 – 3.1.x Older, unsupported versions   Improperly secured actuator endpoints in Spring Cloud Gateway WebFlux allow unauthorized modification of Spring Environment properties. Unauthorized access potential privilege escalation 

Remediation – 

Upgrade Immediately patch to fixed versions: 

Affected Version Range Upgrade To 
4.3.x 4.3.1 
4.2.x 4.2.5 
4.1.x and 4.0.x 4.1.11 
3.1.x 3.1.11 
Unsupported versions Migrate to a supported release 

If you are unable to upgrade right now, here are the recommendations below 

  • Remove gateway from the “management.endpoints.web.exposure.include” property or secure the actuator endpoints. 
  • Secure actuator endpoints with proper authentication and access controls. 
  • Regularly audit and harden application configuration files. 
  • Monitor application and network logs for suspicious activity or unauthorized access attempts. 
  • Implement firewall rules or reverse proxies to restrict access to sensitive endpoints. 
  • Ensure all systems follow patch management and update policies. 

Conclusion 
CVE-2025-41243 is a critical vulnerability affecting Spring Cloud Gateway WebFlux, allowing remote attackers to modify environment properties when actuator endpoints are misconfigured and exposed.

While no active exploitation has been observed in the wild, vulnerability poses a high risk to application integrity and security due to its CVSS score of 10.0 and ease of exploitation in exposed systems.

Organizations are strongly advised to upgrade to the fixed versions, secure actuator endpoints, and follow best practices to reduce attack surface and prevent future exploitation. 

References 

Security Advisory

Critical WhatsApp Zero-Day Vulnerability Allows Remote Code Execution  

Summary 

OEM WhatsApp 
Severity Medium 
CVSS Score 5.4 
CVEs CVE-2025-55177 
POC Available No 
Actively Exploited No 
Exploited in Wild No 
Advisory Version 1.0 

Overview 

A security vulnerability recently discovered in WhatsApp’s linked device feature that allows users to access WhatsApp across multiple devices, such as phones and computers.

CISA has added this flaw to its Known Exploited Vulnerabilities (KEV) Catalog, highlighting its significance. The flaw allows attackers to send crafted messages that forced WhatsApp to load malicious content from a rogue website without any user interaction. WhatsApp and Apple already patched the issue and users are urged to update their apps immediately to stay protected.

                Vulnerability Name CVE ID Product Affected Severity Fixed Version 
WhatsApp Incorrect Authorization Vulnerability  CVE-2025-55177 WhatsApp  Medium 2.25.21.73 and later. 
 
WB iOS 2.25.21.78 and later.  
WhatsApp Desktop for Mac 2.25.21.78 and later. 

Technical Summary 

The vulnerability was due to incomplete authorization of synchronization messages in WhatsApp’s linked device feature. This flaw allowed an attacker to send crafted sync messages that could trick WhatsApp into processing content from an arbitrary URL, even if the message came from an untrusted source.

This could result in WhatsApp loading and executing malicious content on the target device without any user interaction. The impact of the attack was significantly increased when combined with a separate Apple OS vulnerability (CVE-2025-43300), making it suitable for sophisticated, targeted exploitation.

CVE ID System Affected  Vulnerability Details Impact 
CVE-2025-55177 WhatsApp for iOS (v2.22.25.2 to v2.25.21.72) 
 WhatsApp Business for iOS (v2.22.25.2 to v2.25.21.77) 
 WhatsApp Desktop for Mac (v2.22.25.2 to v2.25.21.77		Incomplete authorization in the linked device sync feature allowed attackers to send crafted sync messages that caused WhatsApp to load content from an arbitrary URL without user interaction. This could be used to execute malicious code on the device. Remote code execution,.  Potential full device compromise.  

Remediation: 

Update the WhatsApp in iOS and mac devices to the latest version 

  • WhatsApp for iOS: Update to v2.25.21.73 or latest version 
  • WhatsApp Business for iOS: Update to v2.25.21.78 or latest version  
  • WhatsApp Desktop for Mac: Update to v2.25.21.78 or latest version 

Conclusion: 
The WhatsApp vulnerability highlights the growing risks of zero-click attacks, where devices can be compromised without any user interaction. This flaw has been exploited in targeted attacks and poses a serious threat to user security and privacy. It is important for all users to keep their apps and operating systems up to date and follow trusted security recommendations

References: 

Security Advisory

Chrome Update Released, Fixes RCE & Multiple Vulnerabilities

Summary 

OEM Google Chrome 
Severity High 
CVSS Score 8.8 
CVEs CVE-2025-9864, CVE-2025-9865, CVE-2025-9866, CVE-2025-9867 
POC Available No 
Actively Exploited No 
Exploited in Wild No 
Advisory Version 1.0 

Overview 

Several security vulnerabilities were recently identified in Chromium-based browsers, affecting components such as the V8 JavaScript engine, Toolbar, Extensions and Downloads. The high severity vulnerability, use-after-free issue, could allow attackers to execute arbitrary code.

Additional medium-severity bugs were found in the Toolbar, Extensions, and Downloads components. The Chrome team has started rolling out Chrome 140 to the stable channel, and users are urged to update their browsers to stay protected. 

Vulnerability Name CVE ID Product Affected Severity Fixed Version 
​Use-after-free vulnerability in V8  CVE-2025-9864 Chrome  High  v140.0.7339.80/81 
​Inappropriate implementation vulnerability in Toolbar  CVE-2025-9865 Chrome  Medium  v140.0.7339.80/81 
Inappropriate implementation vulnerability in Extensions  CVE-2025-9866 Chrome  Medium  v140.0.7339.80/81 
Inappropriate implementation vulnerability in Downloads  CVE-2025-9867 Chrome  Medium  v140.0.7339.80/81 

Technical Summary 

Multiple vulnerabilities were addressed in Google Chrome prior to version 140.0.7339.80. The most critical, CVE-2025-9864, is a use-after-free issue in the V8 JavaScript engine that allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Other medium-severity issues include a Toolbar vulnerability on Android that could be exploited via specific user gestures to spoof domains, a security gap in Extensions allowing attackers to bypass content security policies, and a Downloads flaw on Android that enabled UI spoofing through manipulated web pages.

These could allow attackers to misuse Chrome’s features or gain higher system privileges.  

CVE ID System Affected  Vulnerability Details Impact 
 CVE-2025-9864  Chrome v139 and prior Use-after-free in V8 engine could allow attackers to execute arbitrary code via malicious webpage  Remote Code Execution 
 CVE-2025-9865  Chrome v139 and prior Improper handling Chrome’s Toolbar component could allow attackers misuse browser functions or gain privilege access  Domain Spoofing / UI Spoofing
 CVE-2025-9866  Chrome v139 and prior Inappropriate implementation in Chrome’s Extensions system, could allow attackers misuse or bypass content security policy  Content Security Policy Bypass
 CVE-2025-9867  Chrome v139 and prior Improper validation in Chrome’s Downloads could allow attackers to perform UI spoofing via crafted HTML   UI Spoofing 

Remediation: 

References: 

  • https://gbhackers.com/chrome-140-release/

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