CVE-2025-6162
📋 TL;DR
A critical buffer overflow vulnerability in TOTOLINK EX1200T routers allows remote attackers to execute arbitrary code by sending specially crafted HTTP POST requests to the /boafrm/formMultiAP endpoint. This affects devices running firmware version 4.1.2cu.5232_B20210713. Attackers can exploit this without authentication to potentially take full control of affected routers.
💻 Affected Systems
- TOTOLINK EX1200T
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, creation of persistent backdoors, lateral movement to internal networks, and botnet recruitment.
Likely Case
Remote code execution allowing attackers to modify router settings, intercept network traffic, or use the device as a pivot point for further attacks.
If Mitigated
Limited impact if devices are behind firewalls with strict inbound filtering or if vulnerable interfaces are not exposed to untrusted networks.
🎯 Exploit Status
Proof-of-concept exploit code is publicly available on GitHub, making exploitation straightforward for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
Check TOTOLINK website for firmware updates. If available, download and install through web interface: Login > System Tools > Firmware Upgrade > Browse > Upload > Upgrade.
🔧 Temporary Workarounds
Disable remote management
allPrevent external access to router web interface
Network segmentation
allIsolate affected routers from critical networks
🧯 If You Can't Patch
- Block inbound access to port 80/443 on affected routers using firewall rules
- Implement network monitoring for unusual HTTP POST requests to /boafrm/formMultiAP
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in web interface: Login > Status > Device Info > Firmware VersionCheck Version:
Not applicable - check via web interfaceVerify Fix Applied:
Verify firmware version is no longer 4.1.2cu.5232_B20210713 after update📡 Detection & Monitoring
Log Indicators:
- HTTP POST requests to /boafrm/formMultiAP with unusual submit-url parameter values
- Router reboot or crash logs
Network Indicators:
- Unusual outbound connections from router
- Traffic spikes to/from router management interface
SIEM Query:
source="router_logs" AND (uri_path="/boafrm/formMultiAP" OR message="buffer overflow")