CVE-2025-4729
📋 TL;DR
This critical vulnerability in TOTOLINK A3002R and A3002RU routers allows remote attackers to execute arbitrary commands via command injection in the HTTP POST request handler. Attackers can exploit this by manipulating the 'macstr' parameter in the '/boafrm/formMapDelDevice' endpoint. All users of affected router models with vulnerable firmware are at risk.
💻 Affected Systems
- TOTOLINK A3002R
- TOTOLINK A3002RU
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the router allowing persistent backdoor installation, network traffic interception, lateral movement to connected devices, and router bricking.
Likely Case
Router takeover enabling network reconnaissance, credential harvesting, and use as a pivot point for attacks on internal networks.
If Mitigated
Limited impact if routers are behind firewalls with strict inbound filtering and network segmentation.
🎯 Exploit Status
Exploit code is publicly available on GitHub. The vulnerability is remotely exploitable with simple HTTP POST requests.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.totolink.net/
Restart Required: Yes
Instructions:
1. Check TOTOLINK website for firmware updates. 2. Download latest firmware for your model. 3. Access router web 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
- Block inbound HTTP/HTTPS traffic to router management interface at network perimeter
- Implement strict network segmentation to limit router exposure
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via web interface or SSH: System Information > Firmware VersionCheck Version:
curl -s http://router-ip/boafrm/formSysCmd | grep -i versionVerify Fix Applied:
Verify firmware version is newer than 3.0.0-B20230809.1615📡 Detection & Monitoring
Log Indicators:
- HTTP POST requests to /boafrm/formMapDelDevice with shell metacharacters in parameters
- Unusual command execution in router logs
Network Indicators:
- HTTP traffic to router management interface containing shell commands in POST data
- Outbound connections from router to unexpected destinations
SIEM Query:
source="router_logs" AND (url="/boafrm/formMapDelDevice" AND (method="POST" AND (param="macstr" AND value CONTAINS "|" OR value CONTAINS ";" OR value CONTAINS "`")))