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PatchSiren cyber security CVE debrief

CVE-2026-26051 Unknown Vendor CVE debrief

CVE-2026-26051 is a critical authentication failure in Mobiliti e-mobi.hu affecting OCPP WebSocket endpoints. According to CISA, an unauthenticated attacker can use a known or discovered charging-station identifier to connect as a legitimate charger, issue or receive OCPP commands, impersonate a station, and corrupt backend-reported charging data. The issue was published by CISA on 2026-03-03 and carries a CVSS 3.1 score of 9.4.

Vendor
Unknown Vendor
Product
Mobiliti e-mobi.hu vers:all/*
CVSS
CRITICAL 9.4
CISA KEV
Not listed in stored evidence
Original CVE published
2026-03-03
Original CVE updated
2026-03-03
Advisory published
2026-03-03
Advisory updated
2026-03-03

Who should care

Operators, integrators, and security teams responsible for Mobiliti/e-mobi.hu EV charging deployments, especially environments exposing OCPP WebSocket services to untrusted networks.

Technical summary

The advisory describes missing authentication on the WebSocket endpoint used for OCPP communications. Because the endpoint accepts sessions without proper authentication, an attacker can impersonate a charging station using a known or discovered station identifier and interact with backend systems as if they were a legitimate charger. The result can include unauthorized control of charging infrastructure, privilege escalation, and corruption of telemetry or operational data sent to the backend.

Defensive priority

Immediate

Recommended defensive actions

  • Restrict exposure of the OCPP WebSocket endpoint to trusted networks and only allow authorized management paths.
  • Require strong authentication and per-station authorization before accepting WebSocket or OCPP sessions.
  • Validate station identifiers and reject unauthenticated or unexpected session initiation attempts.
  • Monitor for station impersonation, abnormal command traffic, and backend data anomalies tied to charging stations.
  • Apply CISA ICS recommended practices and defense-in-depth guidance to harden the charging management environment.
  • Use the vendor contact path in the advisory to request remediation status and updates.

Evidence notes

All core claims are taken from CISA CSAF ICSA-26-062-06 and its linked references. The advisory text states that WebSocket endpoints lack proper authentication, enabling unauthorized station impersonation, OCPP command abuse, and backend data corruption. The supplied corpus also records that Mobiliti did not respond to CISA's request for coordination. Published and modified dates in the supplied source are 2026-03-03.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-26051 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-26051

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

  • CVE-2026-26051 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-26051

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

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2026/icsa-26-062-06.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-26-062-06

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/resources-tools/resources/ics-recommended-practices

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/topics/industrial-control-systems

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-alerts/ics-alert-10-301-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf

    Reference

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.