CVE-2025-40816
📋 TL;DR
This vulnerability affects multiple Siemens LOGO! programmable logic controller models, allowing unauthenticated remote attackers to manipulate device IP addresses. Exploitation renders devices unreachable by disrupting network connectivity, impacting industrial control systems using these devices.
💻 Affected Systems
- LOGO! 12/24RCE (6ED1052-1MD08-0BA2)
- LOGO! 12/24RCEo (6ED1052-2MD08-0BA2)
- LOGO! 230RCE (6ED1052-1FB08-0BA2)
- LOGO! 230RCEo (6ED1052-2FB08-0BA2)
- LOGO! 24CE (6ED1052-1CC08-0BA2)
- LOGO! 24CEo (6ED1052-2CC08-0BA2)
- LOGO! 24RCE (6ED1052-1HB08-0BA2)
- LOGO! 24RCEo (6ED1052-2HB08-0BA2)
- SIPLUS LOGO! 12/24RCE (6AG1052-1MD08-7BA2)
- SIPLUS LOGO! 12/24RCEo (6AG1052-2MD08-7BA2)
- SIPLUS LOGO! 230RCE (6AG1052-1FB08-7BA2)
- SIPLUS LOGO! 230RCEo (6AG1052-2FB08-7BA2)
- SIPLUS LOGO! 24CE (6AG1052-1CC08-7BA2)
- SIPLUS LOGO! 24CEo (6AG1052-2CC08-7BA2)
- SIPLUS LOGO! 24RCE (6AG1052-1HB08-7BA2)
- SIPLUS LOGO! 24RCEo (6AG1052-2HB08-7BA2)
⚠️ 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 loss of device connectivity leading to operational disruption in industrial environments, potentially causing production downtime or safety issues in critical systems.
Likely Case
Network isolation of affected devices requiring physical intervention to restore connectivity, causing temporary operational impact.
If Mitigated
Minimal impact if devices are properly segmented in isolated networks with strict access controls.
🎯 Exploit Status
The vulnerability description indicates unauthenticated remote exploitation is possible, suggesting relatively simple attack vectors.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: https://cert-portal.siemens.com/productcert/html/ssa-267056.html
Restart Required: No
Instructions:
No firmware patch is currently available. Follow vendor recommendations for network segmentation and access controls.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected LOGO! devices in dedicated network segments with strict firewall rules.
Access Control Lists
allImplement network ACLs to restrict access to LOGO! devices only from authorized management systems.
🧯 If You Can't Patch
- Deploy network monitoring to detect unauthorized access attempts to LOGO! devices
- Implement physical security controls to prevent unauthorized physical access to devices
🔍 How to Verify
Check if Vulnerable:
Check device model numbers against affected product list. Verify if devices are accessible from unauthorized networks.Check Version:
Check device labeling for model numbers: 6ED1052-* or 6AG1052-* seriesVerify Fix Applied:
Test network connectivity restrictions by attempting to access devices from unauthorized networks.📡 Detection & Monitoring
Log Indicators:
- Unexpected network configuration changes
- Failed connection attempts from unauthorized IPs
- Device unreachable alerts
Network Indicators:
- Unusual traffic patterns to LOGO! device ports
- Connection attempts from external networks to internal industrial devices
SIEM Query:
source_ip IN (external_networks) AND dest_ip IN (logo_device_ips) AND port IN (industrial_protocol_ports)