CVE-2025-7213
📋 TL;DR
This critical vulnerability in FNKvision FNK-GU2 devices allows attackers with physical access to exploit improper access control in the UART interface, potentially gaining unauthorized access to on-chip debug and test functionality. It affects FNK-GU2 devices up to version 40.1.7, requiring physical proximity to the hardware.
💻 Affected Systems
- FNKvision FNK-GU2
⚠️ 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 device compromise allowing attackers to extract sensitive data, modify firmware, or establish persistent backdoors through debug interfaces.
Likely Case
Unauthorized access to debug functionality leading to information disclosure or limited system manipulation by attackers with physical access.
If Mitigated
Limited impact if devices are physically secured and debug interfaces are disabled in production environments.
🎯 Exploit Status
Exploit requires physical access and technical knowledge of UART interfaces; exploit details have been publicly disclosed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Contact FNKvision for firmware updates beyond version 40.1.7.
🔧 Temporary Workarounds
Physical Security Controls
allSecure devices in locked enclosures to prevent physical access to UART ports.
Disable Debug Interfaces
allIf supported by firmware, disable UART debug interfaces in production environments.
🧯 If You Can't Patch
- Implement strict physical access controls to device locations
- Monitor for unauthorized physical access attempts and tampering
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface or serial console; if version is 40.1.7 or earlier, device is vulnerable.Check Version:
Check device web interface or use serial console commands specific to FNK-GU2 firmwareVerify Fix Applied:
Verify firmware version is above 40.1.7 when vendor patch becomes available.📡 Detection & Monitoring
Log Indicators:
- Physical tampering alerts
- Unexpected serial console access attempts
Network Indicators:
- None - physical access required
SIEM Query:
Search for physical security breach alerts or device tampering indicators