CVE-2022-26210
📋 TL;DR
This CVE describes a command injection vulnerability in multiple Totolink router models that allows attackers to execute arbitrary commands via the FileName parameter in the setUpgradeFW function. Attackers can exploit this to gain full control of affected devices. Users of the specified Totolink router models with vulnerable firmware versions are affected.
💻 Affected Systems
- Totolink A830R
- Totolink A3100R
- Totolink A950RG
- Totolink A800R
- Totolink A3000RU
- Totolink A810R
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attackers to install persistent backdoors, intercept all network traffic, pivot to internal networks, and use the device for botnet activities.
Likely Case
Remote code execution leading to device takeover, credential theft, and network surveillance.
If Mitigated
Limited impact if devices are behind firewalls with strict inbound filtering and network segmentation.
🎯 Exploit Status
Public proof-of-concept exists in GitHub repositories. The vulnerability requires no authentication and has simple exploitation vectors.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Totolink website for latest firmware updates for each model
Vendor Advisory: No official vendor advisory URL found. Check manufacturer website.
Restart Required: Yes
Instructions:
1. Visit Totolink official website. 2. Download latest firmware for your specific model. 3. Log into router admin interface. 4. Navigate to firmware upgrade section. 5. Upload and apply new firmware. 6. Reboot device.
🔧 Temporary Workarounds
Network Access Control
allRestrict access to router management interface using firewall rules
Disable Remote Management
allTurn off remote administration features if not required
🧯 If You Can't Patch
- Isolate affected routers in separate network segments with strict firewall rules
- Implement network monitoring and intrusion detection for suspicious traffic to/from routers
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface and compare with vulnerable versions listed in CVECheck Version:
Login to router admin interface and check System Status or Firmware Information pageVerify Fix Applied:
Verify firmware version has been updated to a version not listed in the affected versions📡 Detection & Monitoring
Log Indicators:
- Unusual firmware upgrade attempts
- Suspicious commands in system logs
- Multiple failed upgrade attempts
Network Indicators:
- Unexpected outbound connections from router
- Traffic to known malicious IPs from router
- Unusual HTTP requests to router management interface
SIEM Query:
source="router_logs" AND ("setUpgradeFW" OR "FileName" OR "firmware upgrade")