CVE-2022-25130
📋 TL;DR
This CVE describes a command injection vulnerability in TOTOLINK router firmware that allows attackers to execute arbitrary commands via crafted MQTT packets. Attackers can gain full control of affected routers, potentially compromising network security. Users of TOTOLINK T6 and T10 routers with specific vulnerable firmware versions are affected.
💻 Affected Systems
- TOTOLINK T6 router
- TOTOLINK T10 router
📦 What is this software?
T10 Firmware by Totolink
T6 Firmware by Totolink
⚠️ Risk & Real-World Impact
Worst Case
Complete router compromise leading to network takeover, credential theft, lateral movement to internal systems, and persistent backdoor installation.
Likely Case
Router compromise allowing traffic interception, DNS manipulation, credential harvesting, and use as attack platform.
If Mitigated
Limited impact if routers are behind firewalls with strict MQTT traffic filtering and network segmentation.
🎯 Exploit Status
Public proof-of-concept exists in GitHub repository. Exploitation requires sending crafted MQTT packets to vulnerable routers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not found in provided references
Restart Required: Yes
Instructions:
1. Check TOTOLINK website for firmware updates
2. Download latest firmware for your model
3. Access router admin interface
4. Navigate to firmware upgrade section
5. Upload and apply new firmware
6. Reboot router after update
🔧 Temporary Workarounds
Disable MQTT service
allDisable MQTT functionality if not required for operations
Access router admin interface -> Advanced Settings -> MQTT Configuration -> Disable
Network isolation
linuxBlock MQTT traffic (port 1883 typically) at network perimeter
iptables -A INPUT -p tcp --dport 1883 -j DROP
iptables -A INPUT -p udp --dport 1883 -j DROP
🧯 If You Can't Patch
- Isolate affected routers in separate VLAN with strict firewall rules
- Implement network monitoring for MQTT traffic anomalies and command injection attempts
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface. If matches affected versions and MQTT is enabled, device is vulnerable.Check Version:
Login to router admin interface and check System Status or Firmware Information pageVerify Fix Applied:
Verify firmware version is updated beyond vulnerable versions. Test MQTT service with safe payloads to confirm command injection is patched.📡 Detection & Monitoring
Log Indicators:
- Unusual MQTT connection attempts
- Suspicious command execution in router logs
- Failed firmware update attempts
Network Indicators:
- MQTT traffic to router on port 1883 with unusual payloads
- Outbound connections from router to unknown destinations
SIEM Query:
source="router_logs" AND ("MQTT" OR "updateWifiInfo") AND ("exec" OR "system" OR "command")