CVE-2025-5515
📋 TL;DR
This critical vulnerability in TOTOLINK X2000R routers allows remote attackers to execute arbitrary commands via command injection in the /boafrm/formMapDel endpoint. Attackers can exploit this by manipulating the devicemac1 parameter to gain unauthorized access and control over affected devices. Users of TOTOLINK X2000R routers with firmware version 1.0.0-B20230726.1108 are affected.
💻 Affected Systems
- TOTOLINK X2000R
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attackers to install persistent backdoors, pivot to internal networks, intercept traffic, or use the device as part of a botnet.
Likely Case
Remote code execution leading to device takeover, credential theft, and network surveillance capabilities.
If Mitigated
Limited impact if devices are behind firewalls with strict inbound filtering and network segmentation.
🎯 Exploit Status
Public exploit code available on GitHub. Attack requires no authentication and has simple exploitation steps.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.totolink.net/
Restart Required: No
Instructions:
No official patch available. Monitor vendor website for security updates. Consider replacing affected devices if no patch is forthcoming.
🔧 Temporary Workarounds
Disable WAN access to management interface
allPrevent external access to the vulnerable web interface
Access router admin panel -> Security -> Remote Management -> Disable
Network segmentation and firewall rules
linuxIsolate affected devices and restrict access to management interface
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
🧯 If You Can't Patch
- Immediately disconnect affected devices from internet-facing networks
- Implement strict network segmentation to isolate vulnerable devices from critical assets
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router admin interface. If version is 1.0.0-B20230726.1108, device is vulnerable.Check Version:
curl -s http://router-ip/ | grep -i firmwareVerify Fix Applied:
Check for updated firmware version from vendor. No fix currently available to verify.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /boafrm/formMapDel
- Commands with shell metacharacters in devicemac1 parameter
- Unexpected process execution from web interface
Network Indicators:
- HTTP requests containing shell commands in parameters
- Outbound connections from router to unexpected destinations
- Sudden traffic spikes from router
SIEM Query:
source="router_logs" AND (url="/boafrm/formMapDel" OR (parameter="devicemac1" AND value MATCHES "[;&|`$()]"))