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PatchSiren cyber security CVE debrief

CVE-2026-44383 Hydro-Québec CVE debrief

CVE-2026-44383 is a high-severity vulnerability with a CVSS score of 8.7. Multiple connections to the backend using the same charging station ID are allowed, which could allow an attacker to deploy multiple instances of malicious OCPP clients to overwhelm the backend. This vulnerability affects organizations using charging stations and OCPP clients. The CVE record was published on 2026-07-10T23:16:48.343Z and has not been modified since then. The NVD entry is currently Received.

Vendor
Hydro-Québec
Product
Le Circuit Electrique charging station backend
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-07
Original CVE updated
2026-07-07
Advisory published
2026-07-07
Advisory updated
2026-07-07

Who should care

Organizations using charging stations and OCPP clients should be aware of this vulnerability and take necessary precautions. They should verify the affected scope and severity with the vendor and implement necessary mitigations. The vulnerability could affect operators, platforms, and security teams, and they should review the CVE record and NVD entry for more information.

Technical summary

The vulnerability allows multiple connections to the backend using the same charging station ID, which could lead to a denial-of-service attack. The CVSS vector is CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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:X/V:X/RE:X/U:X. The vulnerability has a high severity score and could be used to overwhelm the backend with malicious OCPP clients.

Defensive priority

High

Recommended defensive actions

  • Verify and limit connections to the backend
  • Implement authentication and authorization for OCPP clients
  • Monitor for suspicious activity
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record was published on 2026-07-10T23:16:48.343Z and has not been modified since then. The NVD entry is currently Received. There is limited information available about the vulnerability, and defenders should verify the affected scope and severity with the vendor. The CVE record does not provide specific details about the vulnerability, but it is considered high-severity with a CVSS score of 8.7.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-44383 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-44383

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-44383 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-44383

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.