Vulnerabilites

Security Advisory

Veeam Backup Patched Critical Vulnerabilities Enabling RCE & Privilege Escalation 

Summary ; Security Advisory

Veeam disclosed three critical vulnerabilities affecting its widely deployed backup software. Veeam Backup & Replication is an enterprise-grade data protection solution used to back up, recover and replicate virtual machines, cloud workloads including physical servers.

OEM Veeam 
Severity Critical 
CVSS Score 9.9 
CVEs CVE-2025-23121, CVE-2025-24286, CVE-2025-24287 
Actively Exploited No 
Exploited in Wild No 
Advisory Version 1.0 

Overview 

Multiple high-impact vulnerabilities have been disclosed in Veeam Backup & Replication and Veeam Agent for Microsoft Windows, impacting versions prior to 12.3.2 and 6.3.2 respectively.

The most critical issue (CVE-2025-23121) may allow a remote code execution (RCE) on the backup server by an authenticated domain user, effectively granting complete control over backup infrastructure. 

The vulnerabilities also include risks of unauthorized modification of backup jobs (CVE-2025-24286) and privilege escalation via local directory manipulation (CVE-2025-24287). These flaws could enable attackers to execute arbitrary code or gain elevated permissions. 

These flaws pose significant risks to organizations relying on Veeam for data integrity and disaster recovery. The data protection system of an organization may get affected if compromised and threaten domain-joined backup servers.

Vulnerability Name CVE ID Product Affected Severity 
​ Remote Code Execution via Authenticated Domain User  CVE-2025-23121 Veeam Backup & Replication  Critical (9.9) 
Arbitrary Code Execution via Backup Operator Role Abuse  CVE-2025-24286 Veeam Backup & Replication  High (7.2) 
Privilege Escalation via Directory Manipulation  CVE-2025-24287 Veeam Agent for Microsoft Windows  Medium (6.1) 

Technical Summary 

CVE ID System Affected Vulnerability Details Impact 
  CVE-2025-23121  Veeam Backup & Replication 12.3.1.1139 and all earlier v12 builds A remote code execution vulnerability affecting domain-joined Veeam backup servers. An authenticated domain user may execute arbitrary commands with elevated privileges.   Remote Code Execution 
  CVE-2025-24286 Veeam Backup & Replication 12.3.1.1139 and earlier  Authenticated users with the Backup Operator role can modify backup job configurations to inject and execute code.   Arbitrary Code Execution 
  CVE-2025-24287  Veeam Agent for Microsoft Windows 6.3.1.1074 and earlier  Local users can manipulate directory contents leading to code execution with elevated privileges.  Local Privilege Escalation  

Remediation: 

Users are strongly advised to apply the following updates to mitigate the risks: 

  • Upgrade Veeam Backup & Replication to 12.3.2 (build 12.3.2.3617) or later 
  • Upgrade Veeam Agent for Microsoft Windows to 6.3.2 (build 6.3.2.1205) or later 

Here are some recommendations below 

  • Limit backup server access to trusted users only to reduce the risk of unauthorized control. 
  • Apply least privilege principles for backup roles so users have only the permissions they need. 
  • Regularly monitor backup job changes and system logs to detect suspicious activity early. 
  • Provide security awareness training to staff focusing on backup and recovery best practices. 

Conclusion:  For Security Best practices

Veeam has released patches to address all three vulnerabilities and urged organizations to update Veeam Backup & Replication 12.3.2 (build 12.3.2.3617) and Veeam Agent for Microsoft Windows 6.3.2 (build 6.3.2.1205) as soon as possible.

For security best practices maintaining up-to-date backup systems, prompt patching and adherence to security best practices are essential to prevent potential exploitation and data compromise.

The critical nature of vulnerabilities demands backup and disaster recovery along with strict access controls and ongoing monitoring as essential tips to safeguard infrastructure that have been backed up from potential attacks. 

References: 

Security Advisory

FBI Warns  End-of-Life Routers Exploited in Active Botnet and Proxy Campaigns 

Summary 

The FBI issued an alert warning of ongoing exploitation of 13 EOL Linksys/Cisco routers by cybercriminal groups operating the 5Socks and Anyproxy services.

The threat actors are using known vulnerabilities in outdated firmware to install malware, hijack routers, and leverage them as part of a botnet or proxy service used to mask malicious activities. 

The malware establishes persistent access via regular communication with a command & control (C2) server, and affected devices are being rented out to other criminals.

The FBI strongly recommends replacing EOL devices with with newer and actively supported model or at least disabling remote management features immediately. 

Technical Details 

Attack Overview 

  • Entry Point: Remote administration services exposed to the Internet. 
  • Authentication Bypass: Attackers bypass password protection to gain shell/root access. 
  • Malware Capabilities: 
  • Maintains persistent presence through C2 check-ins every 60 seconds to 5 minutes. 
  • Opens ports to act as proxy relays. 
  • Enables the sale of infected routers as “proxy-as-a-service” infrastructure. 

Confirmed Vulnerable Devices 

The FBI has identified the following end-of-life (EOL) routers from Cisco and Linksys as actively targeted in these campaigns: 

  • E1200 
  • E2500 
  • E1000 
  • E4200 
  • E1500 
  • E300 
  • E3200 
  • WRT320N 
  • E1550 
  • WRT610N 
  • E100 
  • M10 
  • WRT310N 

Indicators of Compromise (IOCs) 

Since the malware is router-based, it is difficult for an end user to know if their device is compromised due to the inability of antivirus tools to scan these devices.

Below is a list of files associated with the malware’s router exploitation campaign: 

Name Hash 
0_forumdisplay-php_sh_gn-37-sh 661880986a026eb74397c334596a2762 
1_banana.gif_to_elf_t 62204e3d5de02e40e9f2c51eb991f4e8 
2_multiquote_off.gif_to_elf_gn-p_forward- 
hw-data-to-exploit-server 		9f0f0632b8c37746e739fe61f373f795 
3_collapse_tcat_gif_sh_s3-sh 22f1f4c46ac53366582e8c023dab4771 
4_message_gif_to_elf_k cffe06b0adcc58e730e74ddf7d0b4bb8 
5_viewpost_gif_to_elf_s 084802b4b893c482c94d20b55bfea47d 
6_vk_gif_to_elf_b e9eba0b62506645ebfd64becdd4f16fc 
7_slack_gif_DATA 41e8ece38086156959804becaaee8985 
8_share_gif_DATA 1f7b16992651632750e7e04edd00a45e 
banana.gif-upx 2667a50869c816fa61d432781c731ed2 
message.gif-upx 0bc534365fa55ac055365d3c31843de7 

Recommended Mitigations: 

  • Replace Vulnerable Devices: Immediately replace EOL routers with models still supported by vendors and receiving firmware/security updates. 
  • Disable Remote Administration: Turn off any form of remote management via web, SSH, or Telnet. 
  • Reboot Compromised Devices: This can temporarily disrupt malware persistence, though not permanently remove it. 
  • Network Segmentation: Isolate critical devices from consumer routers or IoT networks. 
  • Implement Monitoring Tools: Use firewalls or network sensors that detect unusual traffic or device behavior. 

“End of life routers were breached by cyber actors using variants of TheMoon malware botnet,” reads the FBI bulletin.

“Recently, some routers at end of life, with remote administration turned on, were identified as compromised by a new variant of TheMoon malware. This malware allows cyber actors to install proxies on unsuspecting victim routers and conduct cyber crimes anonymously.”

References: 


Scroll to top