CVE-2026-20744

CRITICAL 9.8

Hydro-Québec Le Circuit Electrique charging station backend Improper Access Control

CVSS Score

9.8

EPSS Score

0.5%

EPSS Percentile

41th

The charging station websocket endpoint accepts connections without proper authentication, which could lead to privilege escalation.

CWE	CWE-284
Vendor	hydro-québec
Product	le circuit electrique charging station backend
Published	Jul 10, 2026
Last Updated	Jul 14, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Hydro-Québec / Le Circuit Electrique charging station backend

0 < June_2026

References

NVD ↗ CVE.org ↗ EPSS Data ↗

hydroquebec.com: https://www.hydroquebec.com/nous-joindre/ cisa.gov: https://www.cisa.gov/news-events/ics-advisories/icsa-26-188-01 github.com: https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-188-01.json

Credits

An anonymous researcher reported this vulnerability to CISA