CVE-2025-40800
📋 TL;DR
This vulnerability allows attackers to perform man-in-the-middle attacks by exploiting missing server certificate validation in the IAM client of affected Siemens software products. Attackers could intercept and manipulate TLS connections to the authorization server, potentially compromising authentication and authorization processes. Organizations using COMOS, NX, Simcenter 3D, Simcenter Femap, or Solid Edge are affected.
💻 Affected Systems
- COMOS V10.6
- NX V2412
- NX V2506
- Simcenter 3D
- Simcenter Femap
- Solid Edge SE2025
- Solid Edge SE2026
⚠️ 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 authentication systems allowing unauthorized access to sensitive engineering data, intellectual property theft, and potential system takeover.
Likely Case
Credential theft, session hijacking, and unauthorized access to protected resources through intercepted authentication flows.
If Mitigated
Limited impact with proper network segmentation, certificate pinning, and monitoring in place.
🎯 Exploit Status
Exploitation requires man-in-the-middle position and knowledge of the target environment. No public exploits available as of analysis.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: COMOS V10.6: Update to latest patch, NX V2412: V2412.8700+, NX V2506: V2506.6000+, Simcenter 3D: V2506.6000+, Simcenter Femap: V2506.0002+, Solid Edge SE2025: V225.0 Update 10+, Solid Edge SE2026: V226.0 Update 1+
Vendor Advisory: https://cert-portal.siemens.com/productcert/html/ssa-212953.html
Restart Required: Yes
Instructions:
1. Download appropriate patches from Siemens support portal. 2. Backup systems and data. 3. Apply patches according to Siemens documentation. 4. Restart affected systems. 5. Verify certificate validation is functioning.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected systems from untrusted networks to reduce man-in-the-middle attack surface.
Certificate Pinning
allImplement certificate pinning at network perimeter devices to validate server certificates.
🧯 If You Can't Patch
- Implement strict network segmentation and firewall rules to limit communication paths
- Deploy network monitoring and IDS/IPS to detect man-in-the-middle attempts
🔍 How to Verify
Check if Vulnerable:
Check software version against affected versions list. Test TLS connections to IAM server with invalid certificates to see if they're accepted.Check Version:
Check Help > About in each application or consult Siemens documentation for version checking commands.Verify Fix Applied:
After patching, test TLS connections with invalid certificates - they should be rejected. Verify version numbers match patched versions.📡 Detection & Monitoring
Log Indicators:
- Failed certificate validation attempts
- Unusual authentication patterns
- Multiple failed TLS handshakes
Network Indicators:
- Unusual traffic patterns between IAM clients and servers
- Suspicious certificate changes
- MITM detection alerts
SIEM Query:
source="network_logs" AND (event_type="tls_handshake" AND certificate_validation="failed") OR (event_type="authentication" AND result="success" FROM suspicious_ip)