CVE-2026-1723
📋 TL;DR
This CVE describes an OS command injection vulnerability in TOTOLINK X6000R routers that allows attackers to execute arbitrary commands on the device. The vulnerability affects X6000R routers running firmware versions through V9.4.0cu.1498_B20250826. Attackers can potentially gain full control of affected routers.
💻 Affected Systems
- TOTOLINK X6000R
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the router allowing attackers to intercept all network traffic, install persistent backdoors, pivot to internal networks, or use the device for botnet activities.
Likely Case
Attackers gain shell access to the router, modify configurations, steal credentials, or use the device as a foothold for further attacks on the internal network.
If Mitigated
Limited impact if network segmentation prevents lateral movement and external access to the router's management interface is restricted.
🎯 Exploit Status
Exploitation requires authentication to the router's web interface. The vulnerability is in parameter handling that allows command injection.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: V9.4.0cu.1498_B20250826 or later
Vendor Advisory: https://www.totolink.net/home/menu/detail/menu_listtpl/download/id/247/ids/36.html
Restart Required: Yes
Instructions:
1. Download latest firmware from TOTOLINK website. 2. Log into router web interface. 3. Navigate to System Tools > Firmware Upgrade. 4. Upload and install the new firmware. 5. Wait for router to reboot automatically.
🔧 Temporary Workarounds
Disable remote management
allPrevent external access to the router's web interface
Restrict management access
allLimit web interface access to specific trusted IP addresses only
🧯 If You Can't Patch
- Isolate the router on a dedicated VLAN with strict firewall rules
- Implement network monitoring for unusual outbound connections from the router
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router web interface under System Status > Firmware VersionCheck Version:
Login to router web interface and navigate to System Status pageVerify Fix Applied:
Verify firmware version is V9.4.0cu.1498_B20250826 or newer after patching📡 Detection & Monitoring
Log Indicators:
- Unusual command execution in system logs
- Multiple failed login attempts followed by successful login
- Configuration changes from unexpected sources
Network Indicators:
- Unusual outbound connections from router
- Traffic to known malicious IPs from router
- Port scans originating from router
SIEM Query:
source="router_logs" AND (command="*;*" OR command="*|*" OR command="*`*" OR command="*$(*")