CVE-2025-40935
📋 TL;DR
This vulnerability affects multiple Siemens RUGGEDCOM industrial networking devices running firmware versions below V5.10.1. An authenticated remote attacker can exploit improper input validation during TLS certificate upload to cause a device crash and reboot, resulting in temporary denial of service. This impacts critical infrastructure environments where these devices are deployed.
💻 Affected Systems
- RUGGEDCOM RMC8388 V5.X
- RUGGEDCOM RS416Pv2 V5.X
- RUGGEDCOM RS416v2 V5.X
- RUGGEDCOM RS900 (32M) V5.X
- RUGGEDCOM RS900G (32M) V5.X
- RUGGEDCOM RSG2100 (32M) V5.X
- RUGGEDCOM RSG2100P (32M) V5.X
- RUGGEDCOM RSG2288 V5.X
- RUGGEDCOM RSG2300 V5.X
- RUGGEDCOM RSG2300P V5.X
- RUGGEDCOM RSG2488 V5.X
- RUGGEDCOM RSG907R
- RUGGEDCOM RSG908C
- RUGGEDCOM RSG909R
- RUGGEDCOM RSG910C
- RUGGEDCOM RSG920P V5.X
- RUGGEDCOM RSL910
- RUGGEDCOM RST2228
- RUGGEDCOM RST2228P
- RUGGEDCOM RST916C
- RUGGEDCOM RST916P
⚠️ 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
Repeated exploitation could cause sustained service disruption in industrial control systems, potentially affecting operational continuity in critical infrastructure.
Likely Case
Temporary device unavailability requiring manual reboot, disrupting network connectivity for connected industrial systems.
If Mitigated
Minimal impact with proper network segmentation and authentication controls limiting attack surface.
🎯 Exploit Status
Exploitation requires authenticated access to the web interface. The vulnerability is in the TLS certificate upload functionality.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: V5.10.1
Vendor Advisory: https://cert-portal.siemens.com/productcert/html/ssa-763474.html
Restart Required: Yes
Instructions:
1. Download firmware V5.10.1 from Siemens support portal. 2. Backup current configuration. 3. Upload and install new firmware via web interface or CLI. 4. Reboot device. 5. Verify firmware version post-update.
🔧 Temporary Workarounds
Restrict web interface access
allLimit access to device web interface to trusted management networks only
Disable TLS certificate upload
allRemove or restrict permissions for TLS certificate management functions if not required
🧯 If You Can't Patch
- Implement strict network segmentation to isolate affected devices from untrusted networks
- Enforce strong authentication policies and monitor for unauthorized access attempts
🔍 How to Verify
Check if Vulnerable:
Check firmware version via web interface (System > About) or CLI command 'show version'Check Version:
show versionVerify Fix Applied:
Confirm firmware version is V5.10.1 or higher after update📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts followed by device reboot
- Unexpected device restarts after TLS certificate operations
- Web interface access from unauthorized sources
Network Indicators:
- Unusual traffic patterns to device web interface on port 443/TCP
- Device becoming unresponsive then rebooting
SIEM Query:
source="RUGGEDCOM" AND (event_type="reboot" OR event_type="authentication_failure")