CVE-2025-29100
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on Tenda AC8 routers via a buffer overflow in the fromSetRouteStatic function. Attackers can exploit this by sending specially crafted network requests to the vulnerable parameter list. This affects users running Tenda AC8 routers with the vulnerable firmware version.
💻 Affected Systems
- Tenda AC8
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise leading to persistent remote access, network traffic interception, lateral movement to other devices, and potential botnet recruitment.
Likely Case
Remote code execution allowing attackers to modify router settings, intercept traffic, or use the device as a pivot point for further attacks.
If Mitigated
Denial of service or limited information disclosure if exploit attempts are blocked by network controls.
🎯 Exploit Status
Public proof-of-concept code exists in GitHub repositories. Exploitation requires network access to the router's management interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: Yes
Instructions:
1. Check Tenda official website for firmware updates
2. Download latest firmware for AC8 model
3. Access router web interface
4. Navigate to System Tools > Firmware Upgrade
5. Upload and install new firmware
6. Reboot router
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to router management interface
Network Segmentation
allIsolate router management interface to trusted network segment
🧯 If You Can't Patch
- Replace affected devices with patched or different models
- Implement strict network access controls to limit exposure
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in web interface under System Status > Firmware VersionCheck Version:
curl -s http://router-ip/goform/getStatus | grep versionVerify Fix Applied:
Verify firmware version has been updated to a version later than V16.03.34.06📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/setRouteStatic
- Multiple failed authentication attempts
- Unexpected process crashes or reboots
Network Indicators:
- Unusual outbound connections from router
- Traffic patterns indicating command and control communication
- Port scanning originating from router
SIEM Query:
source="router-logs" AND (uri="/goform/setRouteStatic" OR process="httpd" AND event="crash")