What is the CVSS score of CVE-2026-20781?

CVE-2026-20781 has a CVSS 3.1 base score of 9.4 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L. EPSS exploitation probability: 0.1%.

Which versions of Cloudcharge.Se are affected by CVE-2026-20781?

CVE-2026-20781 is a critical vulnerability affecting WebSocket endpoints that allows attackers to bypass authentication and impersonate stations, potentially manipulating backend data without…

How to fix or mitigate CVE-2026-20781?

Within 24 hours: Identify and inventory all WebSocket endpoints in production; assess exposure scope and enable enhanced logging on affected systems. Within 7 days: Implement compensating controls (WAF rules, IP whitelisting, network segmentation); conduct threat hunt for suspicious WebSocket activity. Within 30 days: Develop and test a comprehensive remediation plan; coordinate with vendor for patch timeline or alternative solutions; complete deployment of permanent fixes.

Cloudcharge.Se CVE-2026-20781

CRITICAL

Missing Authentication for Critical Function (CWE-306)

2026-02-27 ics-cert@hq.dhs.gov

Authentication Bypass Cloudcharge.Se

9.4

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.4 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

CVE Published

Feb 27, 2026 - 00:16 nvd

CRITICAL 9.4

DescriptionCVE.org

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.

AnalysisAI

Missing WebSocket authentication in industrial/IoT device management allows unauthenticated attackers to perform station impersonation, data injection, and denial of service. One of several related CVEs affecting the same WebSocket endpoints.

Technical ContextAI

CWE-306 missing authentication for critical WebSocket endpoints. Attackers can connect without credentials and send commands that impersonate legitimate stations.