CVE-2026-20744Network attack vector

Pre-auth privilege escalation via unauthenticated WebSocket

Published Jul 10, 2026 · Updated Jul 10, 2026

Improper access control in Hydro-Québec Le Circuit électrique charging station backend before June 2026 allows remote attackers to gain privileges. The charging-station WebSocket endpoint accepts OCPP client connections without authenticating the connecting station. No credentials or user interaction are required, but CISA has not disclosed the privileges or backend actions available after connection.

CVSS severity9.3
Critical
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Hydro-Québec Le Circuit électrique charging station backend before June 2026 allows remote attackers to gain privileges. The charging-station WebSocket endpoint accepts OCPP client connections without authenticating the connecting station. No credentials or user interaction are required, but CISA has not disclosed the privileges or backend actions available after connection.

The record

CVE
CVE-2026-20744
Published
Jul 10, 2026
Updated
Jul 10, 2026
Vendor
Hydro-Québec
Product
Le Circuit électrique charging station backend
Classifications
CWE-284, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <June_2026

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Hydro-Québec · Le Circuit électrique charging station backendversion=0 <June_2026

Published CVSS scores

9.8CISA ICS-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3CISA ICS-CERTCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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