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Vulnerability record · CVE-2026-40702 · published 25 June 2026

CVE-2026-40702: Missing authentication for critical function vulnerability

WebSocket endpoints lack proper authentication mechanisms, enabling attackers to impersonate charging stations. As a result, attackers can exploit this weakness to gain unauthorized access to sensitive data or perform unauthorized actions. Given that no authentication is required, this can lead to privilege escalation and potentially compromise the security of the entire system.

9.3 CVSS 4.0 Critical EPSS 0.65% · top 51.1% CWE-306 · Missing authentication for critical function Deferred
9.3CVSS 4.0 base score
0.65%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
26 Jun 2026Last modified by NVD

Description

WebSocket endpoints lack proper authentication mechanisms, enabling attackers to impersonate charging stations. As a result, attackers can exploit this weakness to gain unauthorized access to sensitive data or perform unauthorized actions. Given that no authentication is required, this can lead to privilege escalation and potentially compromise the security of the entire system.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://evokesystems.com/contact-us/
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-176-02.json
https://www.cisa.gov/news-events/ics-advisories/icsa-26-176-02

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Source: NIST National Vulnerability Database (record CVE-2026-40702), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.