CVE-2026-1140
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on UTT 进取 520W routers by exploiting a buffer overflow in the ConfigExceptAli function. Attackers can take full control of affected devices without authentication. All users running version 1.7.7-180627 are vulnerable.
💻 Affected Systems
- UTT 进取 520W
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attackers to install persistent malware, pivot to internal networks, intercept all network traffic, or brick the device.
Likely Case
Remote code execution leading to device takeover, credential theft, and use as a foothold for further network attacks.
If Mitigated
Limited impact if device is isolated behind firewalls with strict network segmentation and access controls.
🎯 Exploit Status
Public exploit code exists on GitHub, making this easily weaponizable. No authentication required for exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: Yes
Instructions:
No official patch available. Vendor has not responded to disclosure. Consider replacing affected devices or implementing strict network controls.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected routers from critical networks and internet exposure
Access Control Lists
linuxRestrict access to router management interface to trusted IPs only
iptables -A INPUT -p tcp --dport 80 -s TRUSTED_IP -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
🧯 If You Can't Patch
- Replace affected devices with supported alternatives
- Implement strict network monitoring and anomaly detection for router traffic
🔍 How to Verify
Check if Vulnerable:
Check firmware version via web interface at http://router-ip/ or via SSH: cat /etc/versionCheck Version:
cat /etc/version 2>/dev/null || grep -i version /proc/cpuinfoVerify Fix Applied:
Verify firmware version is no longer 1.7.7-180627📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/ConfigExceptAli
- Multiple failed buffer overflow attempts in system logs
- Unexpected process crashes or restarts
Network Indicators:
- Unusual outbound connections from router
- Traffic spikes to/from router management interface
- Suspicious payloads in HTTP POST requests
SIEM Query:
source="router_logs" AND (uri="/goform/ConfigExceptAli" OR message="*buffer*" OR message="*overflow*")