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PatchSiren cyber security CVE debrief

CVE-2026-27027 Unknown Vendor CVE debrief

CVE-2026-27027 covers an exposure in Everon OCPP backends where charging-station authentication identifiers were publicly accessible through web-based mapping platforms. CISA assigned a CVSS 3.1 score of 6.5 (Medium) and published the advisory on 2026-03-03. The source remediation note says Everon shut down the platform on 2025-12-01, so current risk depends on whether any related services, mirrors, caches, or retained data remain accessible.

Vendor
Unknown Vendor
Product
Everon api.everon.io vers:all/*
CVSS
MEDIUM 6.5
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

EV charging operators, site owners, OT/ICS security teams, and anyone who used or integrated with Everon OCPP backends or api.everon.io should review exposure of charging-station identifiers and verify that no residual data remains public.

Technical summary

The advisory states that charging-station authentication identifiers were publicly accessible via web-based mapping platforms. The provided CVSS vector is AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N, indicating network-reachable exposure with limited confidentiality and integrity impact. CISA’s source metadata also records SSVCv2 as E:N/A:Y. A remediation note indicates the Everon platform was shut down on 2025-12-01.

Defensive priority

Medium: the issue is publicly documented and concerns authentication identifiers, but the source remediation note says the platform was shut down before CVE publication. Verify promptly whether any residual exposure, archived data, or successor services still exist.

Recommended defensive actions

  • Confirm whether any Everon or api.everon.io-related services, mirrors, or cached datasets are still publicly reachable.
  • Inventory charging-station authentication identifiers and reissue or rotate any values that may have been exposed.
  • Review access logs and external telemetry for access to mapping-platform-linked data or related backend endpoints.
  • Remove or restrict public exposure of sensitive charging-station identifiers and apply least-privilege access controls.
  • Follow CISA ICS recommended practices and defense-in-depth guidance for EV charging and OT environments.

Evidence notes

All conclusions are based on the supplied CISA CSAF advisory metadata and official reference links. The source description explicitly says charging station authentication identifiers are publicly accessible via web-based mapping platforms. The remediation field states Everon shut down the platform on 2025-12-01. The advisory was initially published on 2026-03-03 and the source corpus does not provide evidence of KEV listing or ransomware use.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-27027 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-27027

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

  • CVE-2026-27027 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-27027

    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-26-062-08.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-26-062-08

    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.