CVE-2025-15502: Sangfor O&M Security System RCE Flaw

CVE-2025-15502 Overview

A command injection vulnerability has been identified in Sangfor Operation and Maintenance Management System versions up to 3.0.8. The vulnerability exists in the SessionController function within the /isomp-protocol/protocol/session endpoint, where improper handling of the Hostname argument enables remote attackers to inject and execute arbitrary operating system commands. This vulnerability can be exploited remotely without authentication, potentially allowing attackers to gain unauthorized access to the underlying system.

Critical Impact

Remote attackers can execute arbitrary OS commands on vulnerable Sangfor Operation and Maintenance Management System installations through manipulation of the Hostname parameter, potentially leading to complete system compromise.

Affected Products

• Sangfor Operation and Maintenance Security Management System versions up to 3.0.8

Discovery Timeline

• January 10, 2026 - CVE-2025-15502 published to NVD
• January 22, 2026 - Last updated in NVD database

Technical Details for CVE-2025-15502

Vulnerability Analysis

This vulnerability is classified under CWE-77 (Command Injection) and CWE-78 (Improper Neutralization of Special Elements used in an OS Command). The affected component, SessionController, fails to properly sanitize user-supplied input in the Hostname argument before passing it to system command execution functions.

The network-accessible nature of the vulnerable endpoint at /isomp-protocol/protocol/session means that attackers can remotely exploit this vulnerability without requiring any prior authentication or user interaction. When the Hostname parameter is processed by the SessionController function, malicious command sequences can be injected and subsequently executed with the privileges of the application process.

The vendor was contacted early about this disclosure but did not respond in any way, leaving organizations using this software potentially exposed. The exploit is publicly available and may be actively used in attacks against unpatched systems.

Root Cause

The root cause of this vulnerability lies in insufficient input validation and sanitization within the SessionController function. The application directly incorporates user-controlled data from the Hostname argument into OS command construction without proper escaping or validation of shell metacharacters. This allows attackers to break out of the intended command context and inject their own malicious commands.

Attack Vector

The attack can be executed remotely over the network. An attacker targets the /isomp-protocol/protocol/session endpoint and crafts a malicious HTTP request containing shell metacharacters and commands within the Hostname parameter. When processed by the SessionController function, these injected commands are executed by the underlying operating system.

Common attack patterns for this type of vulnerability include command chaining using shell operators such as semicolons (;), pipes (|), and command substitution sequences. Attackers may leverage this access to establish reverse shells, exfiltrate data, or pivot to other systems within the network.

For additional technical details, refer to the GitHub Issue Discussion and the VulDB entry.

Detection Methods for CVE-2025-15502

Indicators of Compromise

• Unusual HTTP requests to /isomp-protocol/protocol/session containing shell metacharacters in the Hostname parameter
• Unexpected process spawning from the Sangfor application process (e.g., shell interpreters, networking utilities)
• Suspicious outbound network connections originating from the system running the Sangfor management software
• Evidence of command execution artifacts such as unexpected files or modified configurations

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block requests containing OS command injection patterns in the Hostname parameter
• Configure intrusion detection systems (IDS) to monitor for exploitation attempts targeting the /isomp-protocol/protocol/session endpoint
• Enable detailed HTTP access logging on systems running the Sangfor software and monitor for anomalous request patterns
• Deploy endpoint detection and response (EDR) solutions to identify suspicious process chains originating from the application

Monitoring Recommendations

• Monitor network traffic to and from systems running Sangfor Operation and Maintenance Management System for signs of exploitation
• Implement log aggregation and correlation to detect patterns indicative of command injection attacks
• Set up alerts for any unexpected shell command execution on systems hosting the vulnerable application
• Regularly review access logs for the affected endpoint to identify potential reconnaissance or attack attempts

How to Mitigate CVE-2025-15502

Immediate Actions Required

• Restrict network access to the Sangfor Operation and Maintenance Management System to trusted IP addresses only using firewall rules
• Place the affected system behind a web application firewall (WAF) configured to block command injection attempts
• Consider temporarily disabling the affected /isomp-protocol/protocol/session endpoint if operationally feasible
• Isolate the affected system to minimize potential lateral movement in case of compromise
• Conduct a security assessment to determine if the system has already been compromised

Patch Information

No official vendor patch information is currently available. The vendor was contacted about this disclosure but did not respond. Organizations should monitor Sangfor security advisories for updates and apply any patches as soon as they become available. Until a patch is released, implementing the recommended workarounds and compensating controls is essential.

Workarounds

• Deploy a reverse proxy or WAF in front of the application with rules specifically blocking command injection patterns in the Hostname parameter
• Implement strict network segmentation to limit exposure of the vulnerable system
• Consider deploying a virtual patching solution that can filter malicious requests before they reach the application
• If possible, restrict access to the management interface to a dedicated management network with strict access controls

# Example firewall rule to restrict access to the Sangfor management system
# Allow only trusted management IPs to access the service
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP