CVE-2025-25268
📋 TL;DR
This vulnerability allows an unauthenticated attacker on the same network to modify system configuration through a specific API endpoint, granting them read and write access. It affects systems with the vulnerable software exposed to adjacent networks. The missing authentication check enables unauthorized access to sensitive configuration data.
💻 Affected Systems
- Specific product information not provided in CVE description
📦 What is this software?
Charx Sec 3000 Firmware by Phoenixcontact
Charx Sec 3050 Firmware by Phoenixcontact
Charx Sec 3100 Firmware by Phoenixcontact
Charx Sec 3150 Firmware by Phoenixcontact
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through configuration manipulation leading to data theft, service disruption, or lateral movement within the network.
Likely Case
Unauthorized configuration changes enabling data access, privilege escalation, or service disruption for adjacent network users.
If Mitigated
Limited impact with proper network segmentation and authentication controls preventing adjacent network access.
🎯 Exploit Status
Exploitation requires network adjacency but no authentication, making it relatively straightforward for attackers on the same network.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified
Vendor Advisory: https://certvde.com/de/advisories/VDE-2025-019
Restart Required: No
Instructions:
1. Monitor vendor advisory for patch release. 2. Apply patch when available. 3. Test in non-production environment first. 4. Deploy to production systems.
🔧 Temporary Workarounds
Network Segmentation
allIsolate vulnerable systems from adjacent networks using VLANs or firewalls
API Endpoint Restriction
allRestrict access to the vulnerable API endpoint using network ACLs or application firewalls
🧯 If You Can't Patch
- Implement strict network segmentation to isolate vulnerable systems
- Deploy network monitoring and intrusion detection for suspicious API requests
🔍 How to Verify
Check if Vulnerable:
Test if unauthenticated API requests to the endpoint from adjacent networks can modify configurationCheck Version:
Check software version against vendor's patched version when availableVerify Fix Applied:
Verify that authentication is required for configuration modification requests📡 Detection & Monitoring
Log Indicators:
- Unauthenticated POST/PUT requests to configuration API endpoints
- Configuration changes from unexpected IP addresses
Network Indicators:
- Unusual traffic patterns to configuration API endpoints
- Requests bypassing authentication mechanisms
SIEM Query:
source_ip IN (internal_range) AND dest_port=api_port AND http_method IN (POST,PUT) AND auth_status='failed'