CVE-2025-15500: Sangfor O&M System RCE Vulnerability

CVE-2025-15500 Overview

A critical OS command injection vulnerability has been identified in Sangfor Operation and Maintenance Management System versions up to 3.0.8. This vulnerability affects the HTTP POST Request Handler component, specifically within the file /isomp-protocol/protocol/getHis. The flaw allows remote attackers to inject arbitrary operating system commands through manipulation of the sessionPath argument, potentially leading to complete system compromise.

Critical Impact

Remote attackers can execute arbitrary OS commands without authentication, potentially gaining full control of affected systems running Sangfor Operation and Maintenance Management System.

Affected Products

• Sangfor Operation and Maintenance Management System versions up to 3.0.8
• Systems exposing the /isomp-protocol/protocol/getHis endpoint
• Network-accessible deployments of the management platform

Discovery Timeline

• January 9, 2026 - CVE-2025-15500 published to NVD
• January 22, 2026 - Last updated in NVD database

Technical Details for CVE-2025-15500

Vulnerability Analysis

This vulnerability represents a classic OS command injection flaw (CWE-78) stemming from improper neutralization of special elements used in an OS command. The affected component processes HTTP POST requests at the /isomp-protocol/protocol/getHis endpoint without properly sanitizing the sessionPath parameter before passing it to system command execution functions.

The vulnerability is remotely exploitable over the network with no authentication required, making it particularly dangerous for internet-facing deployments. An attacker can craft malicious HTTP POST requests containing shell metacharacters or command separators within the sessionPath argument, causing the backend system to execute arbitrary commands with the privileges of the web application process.

The exploit methodology has been publicly disclosed, significantly increasing the risk profile for organizations running vulnerable versions. The vendor was contacted regarding this vulnerability but did not respond, leaving affected systems without an official patch.

Root Cause

The root cause of CVE-2025-15500 is insufficient input validation and sanitization in the HTTP POST Request Handler component. The sessionPath parameter is directly incorporated into OS command strings without proper escaping or validation, enabling command injection through techniques such as command chaining (using ;, &&, or ||) or command substitution (using backticks or $()). This represents a violation of secure coding practices outlined in CWE-77 (Improper Neutralization of Special Elements used in a Command) and CWE-78 (OS Command Injection).

Attack Vector

The attack vector for this vulnerability is network-based, requiring no user interaction or prior authentication. An attacker can exploit this flaw by sending specially crafted HTTP POST requests to the vulnerable endpoint /isomp-protocol/protocol/getHis. By injecting malicious payloads into the sessionPath parameter, the attacker can execute arbitrary system commands on the underlying operating system.

The exploitation process involves identifying an accessible instance of the Sangfor Operation and Maintenance Management System, crafting a POST request with shell metacharacters embedded in the sessionPath parameter, and observing command execution results either through direct output, time-based techniques, or out-of-band data exfiltration channels.

Detection Methods for CVE-2025-15500

Indicators of Compromise

• Suspicious HTTP POST requests to /isomp-protocol/protocol/getHis containing shell metacharacters (;, |, &&, ||, backticks, $())
• Unexpected process spawning from the Sangfor web application process
• Anomalous network connections originating from the management system server
• Evidence of command execution patterns in web server access logs targeting the vulnerable endpoint

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block command injection patterns in HTTP POST parameters
• Monitor system process trees for unexpected child processes spawned by the Sangfor application
• Deploy intrusion detection system (IDS) signatures for known command injection attack patterns targeting this endpoint
• Review web server logs for requests containing encoded or obfuscated command injection payloads

Monitoring Recommendations

• Enable verbose logging for HTTP POST requests to the /isomp-protocol/protocol/getHis endpoint
• Configure alerting for any requests containing shell metacharacters in the sessionPath parameter
• Monitor outbound network connections from the Sangfor management system for potential reverse shell activity
• Implement file integrity monitoring on critical system binaries and configuration files

How to Mitigate CVE-2025-15500

Immediate Actions Required

• Restrict network access to the Sangfor Operation and Maintenance Management System to trusted networks only
• Implement firewall rules to block external access to the /isomp-protocol/protocol/getHis endpoint
• Deploy a web application firewall with command injection protection enabled
• Consider taking the system offline if it is internet-facing and no mitigations can be applied

Patch Information

No official patch is currently available from Sangfor. The vendor was contacted regarding this vulnerability but did not respond. Organizations should monitor the VulDB entry and vendor communications for any future security updates. In the absence of an official fix, implementing network-level and application-level mitigations is critical.

Workarounds

• Place the Sangfor Operation and Maintenance Management System behind a VPN or restrict access to internal networks only
• Implement reverse proxy rules to filter and sanitize the sessionPath parameter before forwarding requests
• Deploy application-layer filtering using a WAF to block requests containing command injection patterns
• Consider replacing or supplementing the system with alternative solutions until a patch is available

# Example firewall rule to block external access to vulnerable endpoint
# Using iptables to restrict access to management interface
iptables -A INPUT -p tcp --dport 80 -s ! 10.0.0.0/8 -j DROP
iptables -A INPUT -p tcp --dport 443 -s ! 10.0.0.0/8 -j DROP

# Example nginx location block to restrict access
# Add to nginx configuration for the Sangfor application
# location /isomp-protocol/ {
#     allow 10.0.0.0/8;
#     allow 192.168.0.0/16;
#     deny all;
# }