CVE-2025-45800
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary commands on TOTOLINK A950RG routers by exploiting improper input validation in the setDeviceName interface. Attackers can gain full control of affected devices, potentially compromising entire networks. All users running the vulnerable firmware version are affected.
💻 Affected Systems
- TOTOLINK A950RG
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device takeover leading to network compromise, data exfiltration, lateral movement to other systems, and persistent backdoor installation.
Likely Case
Router compromise allowing traffic interception, DNS hijacking, credential theft, and use as a pivot point for further attacks.
If Mitigated
Limited impact if device is behind firewall with restricted WAN access and proper network segmentation.
🎯 Exploit Status
The GitHub reference contains detailed exploitation information. This is a classic command injection vulnerability requiring minimal technical skill to exploit.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: Yes
Instructions:
1. Check TOTOLINK website for firmware updates. 2. Download latest firmware. 3. Access router admin interface. 4. Navigate to firmware upgrade section. 5. Upload and apply new firmware. 6. Reboot router.
🔧 Temporary Workarounds
Disable remote administration
allPrevent external access to router administration interface
Network segmentation
allIsolate router management interface to separate VLAN
🧯 If You Can't Patch
- Replace affected devices with patched or alternative models
- Implement strict network firewall rules blocking all unnecessary access to router management interface
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface. If version matches V4.1.2cu.5204_B20210112, device is vulnerable.Check Version:
Check router web interface at System Status or similar section for firmware versionVerify Fix Applied:
Verify firmware version has changed from vulnerable version. Test setDeviceName interface with safe payloads to confirm command injection is no longer possible.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution in system logs
- Multiple failed authentication attempts to admin interface
- Suspicious device name changes
Network Indicators:
- Unusual outbound connections from router
- Traffic to known malicious IPs
- DNS queries to suspicious domains
SIEM Query:
source="router_logs" AND (message="*setDeviceName*" OR message="*deviceMac*" OR message="*command injection*")