CVE-2026-20781

WebSocket endpoints lack proper authentication mechanisms, enabling attackers to perform unauthorized station impersonation and manipulate data sent to the backend. An unauthenticated attacker can connect to the OCPP WebSocket endpoint using a known or discovered charging station identifier, then issue or receive OCPP commands as a legitimate charger. Given that no authentication is required, this can lead to privilege escalation, unauthorized control of charging infrastructure, and corruption of charging network data reported to the backend.

CVSS v3 9.4 CRITICAL

9.4^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://cloudcharge.tech/support/contact/	Product
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-057-03.json	Third Party Advisory
https://www.cisa.gov/news-events/ics-advisories/icsa-26-057-03	Third Party Advisory US Government Resource

Configurations

Configuration 1 (hide)

cpe:2.3:a:cloudcharge:cloudcharge.se:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-02-27 00:16

Updated : 2026-03-05 20:16

NVD link : CVE-2026-20781

Mitre link : CVE-2026-20781

CVE.ORG link : CVE-2026-20781

JSON object : View

Products Affected

cloudcharge

cloudcharge.se

CWE

CWE-306

Missing Authentication for Critical Function

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