CVE-2026-1137
📋 TL;DR
A buffer overflow vulnerability in the UTT 进取 520W router firmware allows remote attackers to execute arbitrary code via the strcpy function in the web authentication configuration endpoint. This affects all systems running version 1.7.7-180627 of the firmware. The vulnerability is remotely exploitable without authentication.
💻 Affected Systems
- UTT 进取 520W router
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, router takeover, credential theft, and lateral movement into connected networks.
Likely Case
Router compromise leading to network traffic interception, DNS hijacking, or botnet recruitment.
If Mitigated
Denial of service or router crash if exploit fails to achieve code execution.
🎯 Exploit Status
Exploit details are publicly available on GitHub. The vulnerability is in a strcpy function which is trivial to exploit.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch exists. Vendor did not respond to disclosure. Consider replacing the device or implementing workarounds.
🔧 Temporary Workarounds
Disable Web Interface
allDisable the router's web management interface to prevent remote exploitation.
Access router CLI via SSH/Telnet and disable web service (exact command varies by model)
Network Segmentation
linuxRestrict access to the router's management interface using firewall rules.
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
🧯 If You Can't Patch
- Replace the router with a supported model from a responsive vendor.
- Isolate the router in a dedicated VLAN with strict access controls.
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via web interface at http://router-ip/ or using CLI command 'show version'.Check Version:
ssh admin@router-ip 'show version' or check web interface System Info pageVerify Fix Applied:
Verify web interface is disabled or inaccessible, or confirm router replacement.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/formWebAuthGlobalConfig
- Router crash/reboot logs
- Large payloads in web requests
Network Indicators:
- Exploit traffic patterns to router port 80/443
- Unexpected outbound connections from router
SIEM Query:
source="router.log" AND (uri="/goform/formWebAuthGlobalConfig" OR "buffer overflow")