CVE-2025-6097: UTT 750W Firmware Auth Bypass Vulnerability

CVE-2025-6097 Overview

A critical authentication vulnerability has been identified in UTT 进取 750W routers running firmware versions up to 5.0. This vulnerability affects the formDefineManagement function within the Administrator Password Handler component, specifically in the /goform/setSysAdm file. The flaw allows remote attackers to change administrator passwords without proper verification, potentially leading to complete device compromise.

Critical Impact
Remote attackers can change administrator passwords without authentication, enabling full administrative control over affected UTT 750W routers.

Affected Products

UTT 750W Firmware versions up to 5.0
UTT 750W Hardware devices

Discovery Timeline

2025-06-16 - CVE-2025-6097 published to NVD
2026-01-08 - Last updated in NVD database

Technical Details for CVE-2025-6097

Vulnerability Analysis

This vulnerability resides in the formDefineManagement function of the UTT 750W router's web management interface. The function, located at /goform/setSysAdm, processes administrator password change requests but fails to implement proper verification mechanisms before allowing password modifications. This weakness falls under CWE-620 (Unverified Password Change), where the application permits password changes without requiring the current password or other authentication factors.

The vulnerability can be exploited remotely over the network without requiring any authentication or user interaction. An attacker with network access to the router's management interface can manipulate the passwd1 argument to set a new administrator password, effectively locking out legitimate administrators and gaining full control of the device.

Root Cause

The root cause of this vulnerability is improper implementation of the password change functionality in the formDefineManagement function. The function accepts password change requests through the passwd1 parameter without verifying:

Whether the requester is currently authenticated as an administrator
Whether the current administrator password has been provided for verification
Whether any session tokens or anti-CSRF mechanisms are in place

This design flaw allows unauthenticated users to directly modify administrator credentials through crafted HTTP requests.

Attack Vector

The attack vector is network-based, allowing remote exploitation. An attacker can target the vulnerability by sending specially crafted HTTP requests to the /goform/setSysAdm endpoint with a malicious passwd1 parameter value. The attack requires no authentication, no user interaction, and has low complexity, making it particularly dangerous for devices exposed to untrusted networks.

The exploit workflow involves sending a POST request to the vulnerable endpoint with the passwd1 parameter set to the attacker's desired password. Once successful, the attacker gains full administrative access to the router, enabling configuration changes, traffic interception, and further network compromise.

Detection Methods for CVE-2025-6097

Indicators of Compromise

Unexpected HTTP POST requests to /goform/setSysAdm from external or unauthorized IP addresses
Administrator password changes without corresponding legitimate administrator activity
Authentication failures for legitimate administrators following successful unauthorized access
Unusual web management interface access patterns or session anomalies

Detection Strategies

Monitor web server access logs for requests to /goform/setSysAdm endpoints
Implement network intrusion detection rules to alert on suspicious traffic to router management interfaces
Configure SIEM rules to correlate administrator password change events with expected administrative activity
Deploy network traffic analysis to identify exploitation attempts targeting router management ports

Monitoring Recommendations

Establish baseline network behavior for router management traffic and alert on deviations
Regularly audit administrator credentials and access logs on affected devices
Implement real-time alerting for any password modification attempts on router management interfaces
Monitor for indicators of lateral movement following potential router compromise

How to Mitigate CVE-2025-6097

Immediate Actions Required

Restrict network access to the router management interface to trusted administrative networks only
Implement firewall rules to block external access to the /goform/setSysAdm endpoint
Place affected UTT 750W devices behind a VPN or management VLAN with strict access controls
Review access logs for signs of exploitation and rotate administrator credentials if compromise is suspected

Patch Information

The vendor (UTT) was contacted early about this disclosure but did not respond. As of the last update date, no official patch has been released. Organizations should monitor the VulDB entry and vendor communications for future patch availability. Additional technical details can be found in the GitHub CVE documentation.

Workarounds

Disable remote management access to the router's web interface if not required
Implement network segmentation to isolate affected devices from untrusted networks
Use an upstream firewall or access control list to restrict access to management ports
Consider replacing affected devices with alternative products from vendors with active security support

bash

# Example firewall rule to restrict access to router management interface
# Block external access to management ports (adjust IP ranges as needed)
iptables -A INPUT -p tcp --dport 80 -s ! 192.168.1.0/24 -j DROP
iptables -A INPUT -p tcp --dport 443 -s ! 192.168.1.0/24 -j DROP

# Alternative: Restrict access to specific management workstation
iptables -A INPUT -p tcp --dport 80 -s 192.168.1.100 -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP