CVE-2022-25451
📋 TL;DR
This vulnerability in Tenda AC6 routers allows remote attackers to execute arbitrary code via a stack overflow in the setstaticroutecfg function. Attackers can exploit this to take complete control of affected devices. Users running vulnerable firmware versions are at risk.
💻 Affected Systems
- Tenda AC6
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full device compromise leading to persistent backdoor installation, network traffic interception, and lateral movement to other devices on the network.
Likely Case
Remote code execution allowing attackers to modify router settings, intercept traffic, or use the device as part of a botnet.
If Mitigated
Limited impact if devices are behind firewalls with strict inbound filtering and network segmentation.
🎯 Exploit Status
Public proof-of-concept code exists in GitHub repositories. Exploitation appears straightforward.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check Tenda website for firmware updates
2. Download latest firmware for AC6 model
3. Access router web interface
4. Navigate to System Tools > Firmware Upgrade
5. Upload and apply new firmware
6. Reboot router
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to router web interface
Network Segmentation
allIsolate router management interface to trusted network
🧯 If You Can't Patch
- Replace affected devices with supported models
- Implement strict firewall rules blocking all inbound traffic to router management interface
🔍 How to Verify
Check if Vulnerable:
Access router web interface > System Status > Firmware Version, check if version matches V15.03.05.09_multiCheck Version:
curl -s http://router-ip/goform/getStatus | grep versionVerify Fix Applied:
Verify firmware version has changed from V15.03.05.09_multi to a newer version📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/setstaticroutecfg
- Multiple failed authentication attempts
Network Indicators:
- Unusual outbound connections from router
- Traffic spikes to/from router management port
SIEM Query:
source="router_logs" AND (uri="/goform/setstaticroutecfg" OR method="POST" AND uri CONTAINS "setstaticroutecfg")