CVE-2026-26288
📋 TL;DR
This vulnerability allows unauthenticated attackers to impersonate legitimate charging stations by connecting to WebSocket endpoints without proper authentication. Attackers can then issue OCPP commands to control charging infrastructure, manipulate data, and escalate privileges. This affects any system using vulnerable OCPP implementations with exposed WebSocket endpoints.
💻 Affected Systems
- OCPP-compliant charging station management systems
⚠️ 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 takeover of charging infrastructure enabling physical damage to vehicles, grid disruption, billing fraud, and safety hazards from unauthorized charging control.
Likely Case
Unauthorized charging station impersonation leading to data manipulation, billing fraud, service disruption, and potential privilege escalation to backend systems.
If Mitigated
Limited impact with proper network segmentation and authentication, potentially only affecting isolated charging stations without critical system access.
🎯 Exploit Status
Exploitation requires only WebSocket client tools and knowledge of charging station identifiers. No authentication bypass needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified
Vendor Advisory: https://www.cisa.gov/news-events/ics-advisories/icsa-26-062-08
Restart Required: No
Instructions:
1. Consult vendor-specific security advisories 2. Implement proper WebSocket authentication 3. Apply vendor patches when available 4. Restart affected services
🔧 Temporary Workarounds
Network Segmentation
linuxIsolate charging station networks from untrusted networks
iptables -A INPUT -p tcp --dport 443 -s trusted_network -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP
WebSocket Authentication
allImplement authentication before WebSocket connection establishment
Configure application-layer authentication in WebSocket server
🧯 If You Can't Patch
- Implement network-level authentication using VPNs or mutual TLS
- Deploy Web Application Firewall (WAF) with WebSocket protection rules
🔍 How to Verify
Check if Vulnerable:
Attempt WebSocket connection to OCPP endpoint without authentication using tools like wscat or custom scriptsCheck Version:
Check vendor documentation for specific version commandsVerify Fix Applied:
Test that unauthenticated WebSocket connections are rejected and proper authentication is required📡 Detection & Monitoring
Log Indicators:
- Unauthorized WebSocket connection attempts
- OCPP commands from unknown station IDs
- Authentication failure logs
Network Indicators:
- WebSocket traffic without authentication headers
- OCPP protocol anomalies
- Unexpected station impersonation
SIEM Query:
source="websocket" AND (action="connect" AND NOT auth_success="true")