CVE-2026-1325: Sangfor Security System Auth Bypass Flaw

CVE-2026-1325 Overview

A weak password recovery vulnerability has been discovered in Sangfor Operation and Maintenance Security Management System up to version 3.0.12. This security flaw affects the edit_pwd_mall function within the file /fort/login/edit_pwd_mall. Through manipulation of the flag argument, attackers can exploit the weak password recovery mechanism. The vulnerability can be exploited remotely over the network, and exploit details have been publicly disclosed. The vendor was contacted early about this disclosure but did not respond.

Critical Impact

Remote attackers can exploit the weak password recovery mechanism to potentially compromise user accounts, bypassing intended authentication controls in the Sangfor Operation and Maintenance Security Management System.

Affected Products

• Sangfor Operation and Maintenance Security Management System up to version 3.0.12
• Systems with exposed /fort/login/edit_pwd_mall endpoint

Discovery Timeline

• 2026-01-22 - CVE CVE-2026-1325 published to NVD
• 2026-01-22 - Last updated in NVD database

Technical Details for CVE-2026-1325

Vulnerability Analysis

This vulnerability falls under CWE-640 (Weak Password Recovery Mechanism for Forgotten Password). The flaw exists in the password recovery functionality of the Sangfor Operation and Maintenance Security Management System. The vulnerable endpoint /fort/login/edit_pwd_mall processes the edit_pwd_mall function, which improperly handles the flag argument. This improper handling allows attackers to manipulate the password recovery process, potentially enabling unauthorized access to user accounts without proper authentication verification.

The network-accessible nature of the vulnerable endpoint means that attackers do not require local access or prior authentication to exploit this vulnerability. The integrity impact allows for unauthorized modification of account credentials, though confidentiality and availability are not directly affected by this specific flaw.

Root Cause

The root cause of this vulnerability lies in insufficient validation of the flag parameter within the edit_pwd_mall function. The password recovery mechanism fails to properly verify user identity before allowing password changes, enabling attackers to bypass the intended security controls. This is a classic example of a weak password recovery implementation where security-critical operations can be manipulated through parameter tampering.

Attack Vector

The attack vector is network-based, allowing remote exploitation without authentication. An attacker can target the /fort/login/edit_pwd_mall endpoint and manipulate the flag argument to bypass password recovery verification steps. Since exploit information has been publicly released, the barrier to exploitation is significantly lower. The attack does not require user interaction or special privileges, making it accessible to a wide range of threat actors.

The vulnerability mechanism involves improper validation of the password recovery request parameters. When the flag argument is manipulated, the system fails to enforce proper identity verification, allowing unauthorized password modifications. For detailed technical analysis, refer to the GitHub Issue Discussion and VulDB entry #342301.

Detection Methods for CVE-2026-1325

Indicators of Compromise

• Unusual or repeated requests to the /fort/login/edit_pwd_mall endpoint
• Anomalous parameter values in the flag argument within password recovery requests
• Multiple password reset attempts originating from unexpected IP addresses
• Account lockouts or password changes without legitimate user requests

Detection Strategies

• Implement web application firewall (WAF) rules to monitor and block suspicious requests to the /fort/login/edit_pwd_mall endpoint
• Configure intrusion detection systems (IDS) to alert on parameter manipulation attempts targeting password recovery functions
• Enable detailed logging for all authentication and password recovery related endpoints
• Deploy SentinelOne Singularity XDR to detect and correlate suspicious authentication bypass attempts across the environment

Monitoring Recommendations

• Monitor access logs for the /fort/login/edit_pwd_mall path with anomalous flag parameter values
• Set up alerts for password changes that occur without corresponding legitimate user session activity
• Track failed authentication attempts followed by successful password resets from different source IPs
• Review audit logs for administrative account modifications that bypass normal workflow

How to Mitigate CVE-2026-1325

Immediate Actions Required

• Restrict network access to the Sangfor Operation and Maintenance Security Management System to trusted IP ranges only
• Implement additional authentication controls such as multi-factor authentication (MFA) for password recovery operations
• Place the affected system behind a reverse proxy with request filtering capabilities
• Monitor for exploitation attempts using the detection strategies outlined above

Patch Information

No official patch information is currently available from the vendor. According to the vulnerability disclosure, the vendor was contacted early about this issue but did not respond. Organizations should monitor the vendor's security advisories and VulDB entry #342301 for updates on patch availability.

Workarounds

• Disable the password recovery functionality at /fort/login/edit_pwd_mall if not operationally required
• Implement network segmentation to isolate the affected system from untrusted networks
• Deploy a web application firewall (WAF) to filter malicious requests targeting the vulnerable endpoint
• Require manual administrator intervention for all password recovery requests as a compensating control

# Example: Block access to vulnerable endpoint using iptables (adjust for your environment)
# Restrict access to the management system to specific trusted IPs only
iptables -A INPUT -p tcp --dport 443 -s TRUSTED_IP_RANGE -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP

# Example: nginx location block to disable vulnerable endpoint
# Add to nginx configuration for the Sangfor system
# location /fort/login/edit_pwd_mall {
#     deny all;
#     return 403;
# }