CVE-2026-42952 Hydro-Québec CVE debrief

Who should care

Organizations using charging stations from unknown vendors should prioritize patching this vulnerability to prevent potential denial-of-service attacks. This vulnerability can impact operators of charging stations, platform administrators, vulnerability management teams, and security teams. It is essential to assess the affected scope and severity to determine the necessary actions.

Technical summary

CVE-2026-42952 is a high-severity vulnerability with a CVSS score of 8.7. The vulnerability exists due to the lack of throttling on repeated authentication attempts to the charging station backend, allowing an attacker to execute a denial-of-service attack. The vulnerability is categorized under CWE-307. The affected product or component is the charging station backend, and the likely operational impact is a denial-of-service attack. The source confidence is limited due to the unknown vendor.

Defensive priority

High

Recommended defensive actions

• Inventory and assess charging station backend systems for potential exposure
• Apply patches or updates from the vendor, if available
• Implement compensating controls, such as rate limiting or IP blocking, to mitigate the vulnerability
• Monitor for suspicious authentication attempts and implement additional security measures as needed
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed

Evidence notes

The CVE record was published on 2026-07-10T23:16:48.203Z and has not been modified since then. The NVD entry is currently Received. The vulnerability is attributed to an unknown vendor, and further information is limited. Evidence is based on CVE and NVD data, which may be subject to change as more information becomes available. Defenders should verify the current status and affected products with the vendor or through official advisories.

Official resources