CVE-2025-41719
📋 TL;DR
A low-privileged remote attacker can corrupt the webserver user storage by sending unsupported characters, leading to deletion of all configured users and creation of a default Administrator account with a known default password. This affects devices running vulnerable webserver software with user management functionality.
💻 Affected Systems
- Specific product information not provided in CVE description
⚠️ 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 takeover of the device via default Administrator account, potential lateral movement to other systems, and data exfiltration.
Likely Case
Unauthorized administrative access to the device, configuration changes, and potential service disruption.
If Mitigated
Limited impact if strong network segmentation and monitoring are in place, though authentication bypass remains possible.
🎯 Exploit Status
Requires low-privileged access but exploit appears straightforward based on description.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: https://sauter.csaf-tp.certvde.com/.well-known/csaf/white/2025/vde-2025-060.json
Restart Required: No
Instructions:
Check vendor advisory for specific patching instructions once available.
🔧 Temporary Workarounds
Restrict network access
allLimit access to the webserver interface to trusted networks only
Monitor user account changes
allImplement logging and alerting for user account creation/modification
🧯 If You Can't Patch
- Implement strict network segmentation to isolate affected devices
- Enable detailed logging of authentication events and monitor for suspicious activity
🔍 How to Verify
Check if Vulnerable:
Check if webserver accepts unsupported characters in user management functionsCheck Version:
Check device/software version against vendor advisoryVerify Fix Applied:
Test if unsupported characters no longer trigger user storage corruption📡 Detection & Monitoring
Log Indicators:
- Unexpected user account deletions
- Creation of default Administrator account
- Authentication attempts with default credentials
Network Indicators:
- Unusual patterns of requests to user management endpoints
- Traffic containing unsupported character sequences
SIEM Query:
Authentication logs showing account deletion followed by default admin creation