CVE-2025-41427
📋 TL;DR
This vulnerability allows remote authenticated attackers to execute arbitrary operating system commands on affected WRC-X3000 series routers through the Connection Diagnostics page. Attackers with valid credentials can send specially crafted requests to run commands with router privileges. All users of WRC-X3000GS, WRC-X3000GSA, and WRC-X3000GSN routers are affected.
💻 Affected Systems
- WRC-X3000GS
- WRC-X3000GSA
- WRC-X3000GSN
⚠️ 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 router compromise leading to network takeover, credential theft, lateral movement to connected devices, and persistent backdoor installation.
Likely Case
Router configuration modification, network traffic interception, DNS hijacking, and credential harvesting from connected devices.
If Mitigated
Limited impact with proper network segmentation, strong authentication, and monitoring preventing successful exploitation.
🎯 Exploit Status
Exploitation requires valid credentials but is straightforward once authenticated
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific firmware versions
Vendor Advisory: https://www.elecom.co.jp/news/security/20250624-01/
Restart Required: Yes
Instructions:
1. Access router web interface. 2. Navigate to firmware update section. 3. Download latest firmware from vendor site. 4. Upload and apply firmware update. 5. Reboot router.
🔧 Temporary Workarounds
Disable web management interface
allPrevent access to vulnerable Connection Diagnostics page
Restrict management access
allLimit web interface access to specific IP addresses only
🧯 If You Can't Patch
- Implement strict network segmentation to isolate router from critical systems
- Enforce strong authentication policies and monitor for credential compromise
🔍 How to Verify
Check if Vulnerable:
Check firmware version against vendor advisory. If running unpatched firmware, assume vulnerable.Check Version:
Check router web interface status page or use vendor-specific CLI commandsVerify Fix Applied:
Verify firmware version matches patched version in vendor advisory and test Connection Diagnostics functionality.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution in system logs
- Multiple failed authentication attempts followed by Connection Diagnostics access
- Unexpected system process creation
Network Indicators:
- Unusual outbound connections from router
- DNS queries to suspicious domains from router
- Traffic redirection patterns
SIEM Query:
source="router_logs" AND (event="command_execution" OR uri="/cgi-bin/diagnostics.cgi") AND suspicious_parameters