CVE-2025-69766
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on Tenda AX3 routers by exploiting a stack-based buffer overflow in the formGetIptv function. Attackers can achieve full system compromise without authentication. All users running the vulnerable firmware version are affected.
💻 Affected Systems
- Tenda AX3 router
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete router takeover with persistent backdoor installation, credential theft, and pivot to internal networks
Likely Case
Router compromise leading to DNS hijacking, traffic interception, and botnet recruitment
If Mitigated
Denial of service or temporary disruption if exploit fails or is blocked
🎯 Exploit Status
Detailed technical analysis and proof-of-concept available in public references
🛠️ 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
3. Access router admin interface
4. Navigate to firmware upgrade section
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 router with different model
- Implement strict firewall rules blocking all external access to router management interface
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router admin interface under System Status or Firmware Upgrade sectionCheck Version:
curl -s http://router-ip/goform/getStatus | grep versionVerify Fix Applied:
Verify firmware version is no longer v16.03.12.11📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/formGetIptv
- Multiple failed exploit attempts
- Abnormal process crashes
Network Indicators:
- Exploit traffic patterns to router management interface
- Unexpected outbound connections from router
SIEM Query:
source="router_logs" AND (uri="/goform/formGetIptv" OR process="httpd" AND event="crash")