CVE-2026-27772
Unauthenticated WebSocket Access Enables OCPP Station Impersonation
Publication date: 2026-02-27
Last updated on: 2026-03-05
Assigner: ICS-CERT
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| ev.energy | ev.energy | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-306 | The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability involves WebSocket endpoints that lack proper authentication mechanisms. Because of this, attackers can impersonate charging stations without authorization by connecting to the OCPP WebSocket endpoint using a known or discovered charging station identifier.
Once connected, the attacker can issue or receive OCPP commands as if they were a legitimate charger, enabling unauthorized control and manipulation of data sent to the backend.
How can this vulnerability impact me? :
The vulnerability can lead to several serious impacts including privilege escalation and unauthorized control of charging infrastructure.
- Attackers can impersonate legitimate charging stations.
- Unauthorized manipulation and corruption of charging network data reported to the backend.
- Potential disruption or misuse of charging services.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
This vulnerability involves unauthenticated access to WebSocket endpoints used by charging stations, where attackers can impersonate stations by connecting with known or discovered identifiers. Detection would involve monitoring network traffic for unauthorized or suspicious WebSocket connections to the OCPP endpoint, especially those that do not follow expected authentication patterns.
Specific commands or tools to detect this vulnerability are not provided in the available resources.
What immediate steps should I take to mitigate this vulnerability?
The vulnerability arises because WebSocket endpoints lack proper authentication, allowing unauthorized access and control. Immediate mitigation steps would logically include implementing authentication mechanisms on the WebSocket endpoints to ensure only legitimate charging stations can connect.
No explicit mitigation steps or recommendations are provided in the available resources.