CVE-2025-36754
📋 TL;DR
This vulnerability allows unauthenticated attackers to bypass authentication on the web interface by crafting POST requests without proper session validation. It affects devices with the vulnerable web interface implementation, potentially enabling attackers to redirect DNS resolution to malicious servers for man-in-the-middle attacks.
💻 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 device compromise allowing DNS redirection to attacker-controlled servers, enabling credential theft, data interception, and further network penetration.
Likely Case
Attackers redirect DNS to malicious servers, intercepting and modifying traffic to steal credentials or deliver malware.
If Mitigated
Limited impact with proper network segmentation and monitoring, though authentication bypass remains possible.
🎯 Exploit Status
Exploitation requires crafting POST requests to modify settings without authentication. No session tokens needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: https://csirt.divd.nl/CVE-2025-36754/
Restart Required: No
Instructions:
1. Monitor vendor advisory for patches. 2. Apply vendor-provided updates when available. 3. Verify authentication is properly implemented.
🔧 Temporary Workarounds
Network Segmentation
linuxRestrict access to web interface to trusted networks only
iptables -A INPUT -p tcp --dport 80 -s TRUSTED_NETWORK -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -s TRUSTED_NETWORK -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
Web Application Firewall
allImplement WAF rules to block unauthenticated POST requests to settings endpoints
🧯 If You Can't Patch
- Disable web interface if not required
- Implement strict network access controls and monitor for unauthorized POST requests
🔍 How to Verify
Check if Vulnerable:
Attempt to send POST request to settings endpoint without authentication. If successful, device is vulnerable.Check Version:
Check web interface version via browser or API endpointVerify Fix Applied:
Verify authentication is required for all POST requests to settings endpoints. Test with unauthenticated requests should fail.📡 Detection & Monitoring
Log Indicators:
- Unauthenticated POST requests to settings endpoints
- DNS configuration changes from unauthenticated sources
Network Indicators:
- POST requests to web interface from unauthorized IPs
- Unexpected DNS server changes
SIEM Query:
source_ip NOT IN trusted_ips AND http_method = POST AND uri CONTAINS '/settings' OR '/config'