CVE-2024-40515
📋 TL;DR
This critical vulnerability in Tenda AX2pro routers allows remote attackers to execute arbitrary code through the routing functionality. Attackers can gain full control of affected devices without authentication. All users running vulnerable firmware versions are at risk.
💻 Affected Systems
- Tenda AX2pro
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of router with persistent backdoor installation, credential theft, network traffic interception, and lateral movement to connected devices.
Likely Case
Router takeover leading to DNS hijacking, credential harvesting, and botnet recruitment for DDoS attacks.
If Mitigated
Limited impact if device is behind firewall with strict inbound filtering and network segmentation.
🎯 Exploit Status
Public proof-of-concept available in GitHub gist; exploitation requires network access to router web interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check Tenda support website for firmware updates
2. Download latest firmware for AX2pro
3. Access router admin 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 administration interface
Network Segmentation
allIsolate router management interface to trusted network segment
🧯 If You Can't Patch
- Place router behind firewall with strict inbound filtering (block WAN access to router admin interface)
- Implement network monitoring for suspicious traffic to/from router management IP
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface under System Status or System ToolsCheck Version:
curl -s http://router-ip/goform/getStatus | grep versionVerify Fix Applied:
Verify firmware version is updated beyond V16.03.29.48_cn📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to routing configuration endpoints
- Multiple failed login attempts followed by successful access
Network Indicators:
- Unexpected outbound connections from router
- Traffic to known malicious IPs from router
SIEM Query:
source="router-logs" AND (uri="/goform/setRouting" OR uri="/goform/getRouting")