What is the CVSS score of CVE-2026-27772?

CVE-2026-27772 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 Ev.Energy are affected by CVE-2026-27772?

CVE-2026-27772 is a critical vulnerability affecting WebSocket authentication that could allow attackers to impersonate legitimate stations and manipulate backend data without authorization.

How to fix or mitigate CVE-2026-27772?

Within 24 hours: Identify all systems exposing WebSocket endpoints and assess current usage in production environments; disable WebSocket functionality if not business-critical. Within 7 days: Implement network segmentation to restrict WebSocket access to trusted networks only and deploy WAF rules to enforce token validation on all WebSocket handshakes. Within 30 days: Establish continuous monitoring for unauthorized WebSocket connections, engage the vendor for patch availability timeline, and develop a rollout plan for patching once available.

Ev.Energy CVE-2026-27772

CRITICAL

Missing Authentication for Critical Function (CWE-306)

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

Authentication Bypass Ev.Energy

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 — fifth CVE in the industrial platform WebSocket family. Same CWE-306 pattern enabling unauthenticated access and station impersonation.