CVE-2026-27764
📋 TL;DR
This WebSocket vulnerability allows session hijacking in charging station management systems by enabling multiple connections with the same predictable session identifier. Attackers can displace legitimate charging stations to receive backend commands or cause denial-of-service. This affects systems using vulnerable WebSocket backends for charging station communication.
💻 Affected Systems
- Charging station management systems with vulnerable WebSocket backends
⚠️ 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
Malicious actors could hijack charging station sessions to send unauthorized commands, potentially causing physical damage to charging infrastructure or vehicles, or enabling energy theft.
Likely Case
Session hijacking leading to denial-of-service where legitimate charging stations are disconnected, disrupting charging operations and potentially causing financial losses.
If Mitigated
With proper session management and authentication controls, impact is limited to temporary connection issues that can be quickly remediated.
🎯 Exploit Status
Exploitation requires network access to WebSocket endpoints but no authentication. Predictable session identifiers make exploitation straightforward.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor-specific updates
Vendor Advisory: https://www.cisa.gov/news-events/ics-advisories/icsa-26-062-06
Restart Required: Yes
Instructions:
1. Review vendor advisory for specific patch details. 2. Apply vendor-provided updates to WebSocket backend. 3. Restart affected services. 4. Verify session management is properly implemented.
🔧 Temporary Workarounds
Implement session validation
allAdd server-side validation to ensure only one active session per charging station identifier
Network segmentation
allRestrict WebSocket endpoint access to authorized networks only
🧯 If You Can't Patch
- Implement network-level controls to restrict WebSocket traffic to trusted sources only
- Deploy Web Application Firewall (WAF) with session hijacking protection rules
🔍 How to Verify
Check if Vulnerable:
Test if multiple WebSocket connections can be established using the same charging station identifier simultaneouslyCheck Version:
Check with vendor-specific version commands or review application configurationVerify Fix Applied:
Verify that only one active WebSocket connection is allowed per charging station identifier and session identifiers are properly randomized📡 Detection & Monitoring
Log Indicators:
- Multiple connection attempts with same session ID
- Rapid session creation/destruction
- Charging station disconnection events
Network Indicators:
- Unusual WebSocket traffic patterns
- Multiple connections from different IPs using same identifiers
- High volume of session establishment requests
SIEM Query:
source="websocket" AND (event="session_creation" OR event="connection") | stats count by session_id | where count > 1