What is the CVSS score of CVE-2026-27767?

CVE-2026-27767 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 Swtchenergy.Com are affected by CVE-2026-27767?

CVE-2026-27767 is a critical vulnerability affecting WebSocket authentication that allows attackers to impersonate legitimate stations and manipulate backend data without authorization.

How to fix or mitigate CVE-2026-27767?

Within 24 hours: Identify all systems using affected WebSocket endpoints and assess current user base exposure; document affected services and notify stakeholders. Within 7 days: Implement compensating controls (WAF rules, network segmentation, IP whitelisting); disable non-critical WebSocket features if possible; enable enhanced logging and monitoring. Within 30 days: Develop and test authentication hardening patches internally; coordinate with vendor for patch timeline; conduct security assessment of all WebSocket implementations.

Swtchenergy.Com CVE-2026-27767

CRITICAL

Missing Authentication for Critical Function (CWE-306)

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

Authentication Bypass Swtchenergy.Com

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 — fourth CVE in the industrial platform WebSocket family. Same CWE-306 root cause enabling unauthenticated station impersonation.