CVE-2026-20781
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 |
|---|---|---|
| cloudcharge | cloudcharge.se | * |
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 occurs because WebSocket endpoints for OCPP (Open Charge Point Protocol) lack proper authentication mechanisms. This means that an attacker who is not authenticated can connect to the OCPP WebSocket endpoint by using a known or discovered charging station identifier.
Once connected, the attacker can impersonate a legitimate charging station and issue or receive OCPP commands as if they were the actual charger.
How can this vulnerability impact me? :
The impact of this vulnerability includes privilege escalation and unauthorized control over the charging infrastructure.
An attacker can manipulate data sent to the backend, potentially corrupting charging network data.
This unauthorized control can disrupt normal operations and compromise the integrity and availability of the charging network.
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?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know