CVE-2024-21797
📋 TL;DR
This vulnerability allows authenticated attackers to execute arbitrary commands on Wavlink AC3000 routers by sending specially crafted HTTP requests to the adm.cgi set_TR069() function. Attackers with valid credentials can gain full control of affected devices. Only Wavlink AC3000 M33A8.V5030.210505 routers are affected.
💻 Affected Systems
- Wavlink AC3000
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attackers to install persistent backdoors, pivot to internal networks, intercept all network traffic, or use the device for botnet activities.
Likely Case
Attackers with valid credentials execute commands to steal credentials, modify device settings, or use the router as a foothold for further attacks.
If Mitigated
With proper network segmentation and strong authentication, impact is limited to the isolated router with no lateral movement.
🎯 Exploit Status
Exploit requires authentication but is straightforward once credentials are obtained. Public technical details available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Check vendor website for firmware updates. If unavailable, implement workarounds.
🔧 Temporary Workarounds
Disable TR-069 remote management
allDisable the vulnerable TR-069 management interface if not required
Network segmentation
allIsolate affected routers in separate VLANs with strict firewall rules
🧯 If You Can't Patch
- Change all default credentials and implement strong authentication policies
- Block external access to router management interfaces at network perimeter
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via web interface: System Status > Firmware VersionCheck Version:
Not applicable - check via web interfaceVerify Fix Applied:
Verify firmware version is newer than M33A8.V5030.210505📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP POST requests to /cgi-bin/adm.cgi with set_TR069 parameter
- Multiple failed authentication attempts followed by successful login
Network Indicators:
- HTTP traffic to router management interface containing command injection patterns
- Outbound connections from router to unusual destinations
SIEM Query:
source="router_logs" AND (uri="/cgi-bin/adm.cgi" AND method="POST" AND params CONTAINS "set_TR069")