CVE-2025-30176
📋 TL;DR
An out-of-bounds read buffer overflow vulnerability in Siemens' User Management Component (UMC) affects multiple industrial automation products. This allows unauthenticated remote attackers to cause denial of service conditions. Organizations using Siemens SIMATIC PCS neo, SINEC NMS, SINEMA Remote Connect, or TIA Portal are affected.
💻 Affected Systems
- SIMATIC PCS neo V4.1
- SIMATIC PCS neo V5.0
- SINEC NMS
- SINEMA Remote Connect
- Totally Integrated Automation Portal (TIA Portal) V17
- Totally Integrated Automation Portal (TIA Portal) V18
- Totally Integrated Automation Portal (TIA Portal) V19
- Totally Integrated Automation Portal (TIA Portal) V20
- User Management Component (UMC)
📦 What is this software?
Sinec Nms by Siemens
Totally Integrated Automation Portal by Siemens
View all CVEs affecting Totally Integrated Automation Portal →
Totally Integrated Automation Portal by Siemens
View all CVEs affecting Totally Integrated Automation Portal →
Totally Integrated Automation Portal by Siemens
View all CVEs affecting Totally Integrated Automation Portal →
⚠️ Risk & Real-World Impact
Worst Case
Complete system crash leading to production downtime in industrial environments, potentially disrupting critical operations.
Likely Case
Service disruption affecting the management components, requiring system restart to restore functionality.
If Mitigated
Limited impact if systems are isolated behind firewalls with proper network segmentation.
🎯 Exploit Status
Unauthenticated remote exploitation lowers the barrier for attackers, but no public exploits are currently known.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: UMC V2.15.1.1, SINEC NMS V4.0, and updates for other affected products as per Siemens advisory
Vendor Advisory: https://cert-portal.siemens.com/productcert/html/ssa-614723.html
Restart Required: Yes
Instructions:
1. Review Siemens advisory SSA-614723. 2. Apply vendor-provided patches for affected products. 3. Restart affected systems after patching. 4. Verify patch installation through version checks.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected systems from untrusted networks using firewalls and VLANs.
Access Control
allRestrict network access to affected systems to authorized IP addresses only.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate affected systems
- Monitor for unusual traffic patterns and system crashes
🔍 How to Verify
Check if Vulnerable:
Check product versions against affected versions list in Siemens advisory SSA-614723Check Version:
Product-specific commands vary; consult Siemens documentation for version checking on each affected productVerify Fix Applied:
Verify installed version meets or exceeds patched versions: UMC >= V2.15.1.1, SINEC NMS >= V4.0📡 Detection & Monitoring
Log Indicators:
- System crash logs
- UMC service failures
- Unexpected process terminations
Network Indicators:
- Unusual traffic to UMC ports
- Multiple connection attempts to affected services
SIEM Query:
Search for: (event_type:crash OR service_failure) AND (process_name:UMC OR product_name:SIEMENS*)