CVE-2025-41699
📋 TL;DR
This vulnerability allows a low-privileged remote attacker with web management access to inject and execute arbitrary commands as root on affected systems. It affects Phoenix Contact devices with vulnerable web interfaces, leading to complete system compromise.
💻 Affected Systems
- Phoenix Contact industrial devices with web management interface
⚠️ 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
Full system takeover with root access, data exfiltration, ransomware deployment, and persistent backdoor installation.
Likely Case
Unauthorized configuration changes, service disruption, and credential theft leading to lateral movement.
If Mitigated
Limited to authenticated users only, but still allows privilege escalation to root.
🎯 Exploit Status
Exploitation requires authentication but is straightforward once authenticated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific fixed versions
Vendor Advisory: https://phoenixcontact.csaf-tp.certvde.com/.well-known/csaf/white/2025/vde-2025-074.json
Restart Required: Yes
Instructions:
1. Download firmware update from Phoenix Contact support portal. 2. Backup current configuration. 3. Apply firmware update via web interface. 4. Verify update completion and restore configuration if needed.
🔧 Temporary Workarounds
Restrict Web Interface Access
allLimit access to web management interface to trusted IP addresses only
Configure firewall rules to allow only specific source IPs to port 80/443
Disable Unused Accounts
allRemove or disable any unnecessary web management accounts
Review and disable unused user accounts in web interface
🧯 If You Can't Patch
- Segment affected devices in isolated network zones with strict access controls
- Implement multi-factor authentication for web management access if supported
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against vendor advisory; if running vulnerable version and has web interface, assume vulnerable.Check Version:
Check web interface system information page or use vendor-specific CLI commandsVerify Fix Applied:
Verify firmware version matches or exceeds patched version listed in vendor advisory.📡 Detection & Monitoring
Log Indicators:
- Unusual configuration changes via web interface
- Unexpected command execution logs
- Multiple failed login attempts followed by successful login
Network Indicators:
- Unusual outbound connections from device post-configuration changes
- Traffic patterns indicating data exfiltration
SIEM Query:
source="device_logs" AND (event="configuration_change" OR event="command_execution") AND user!="admin"