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PatchSiren cyber security CVE debrief

CVE-2026-5387 AVEVA CVE debrief

CVE-2026-5387 is a critical privilege-escalation issue in AVEVA Pipeline Simulation. According to the CISA CSAF advisory, an unauthenticated attacker could perform actions intended only for Simulator Instructor or Simulator Developer (Administrator) roles, with potential impact to simulation parameters, training configuration, and training records. The advisory lists an available vendor fix and recommends network-layer protections and TLS for API communications.

Vendor
AVEVA
Product
Pipeline Simulation
CVSS
CRITICAL 9.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-16
Original CVE updated
2026-04-16
Advisory published
2026-04-16
Advisory updated
2026-04-16

Who should care

OT and ICS teams running AVEVA Pipeline Simulation, especially operators of exposed Pipeline Simulation Server API instances; security administrators responsible for segmentation, certificate management, and access control; and incident responders supporting training or simulation environments.

Technical summary

The provided advisory describes an unauthenticated attack path that enables privilege escalation to higher-privilege simulator roles. The documented impact is unauthorized operations against simulation parameters, training configuration, and training records. The supplied CVSS vector is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N, matching a network-reachable, no-authentication, no-user-interaction issue with high confidentiality and integrity impact. Affected versions are listed as AVEVA Pipeline Simulation <=2025_SP1_build_7.1.9497.6351, with remediation available in 2025 SP1 P01 (build 7.1.9580.8513) or later.

Defensive priority

Urgent. This is a critical, unauthenticated, network-facing privilege escalation affecting industrial simulation and training data integrity.

Recommended defensive actions

  • Upgrade AVEVA Pipeline Simulation to 2025 SP1 P01 (build 7.1.9580.8513) or later.
  • Restrict network access to Pipeline Simulation Server API nodes so only trusted client systems can connect.
  • Enable TLS for all API communications and protect server certificates.
  • Review exposure of any Pipeline Simulation services that may be reachable beyond trusted management networks.
  • Check simulator and training records for unauthorized changes consistent with privilege misuse.

Evidence notes

This debrief is based on the supplied CISA CSAF advisory for ICSA-26-106-04 / CVE-2026-5387, published and modified on 2026-04-16T06:00:00.000Z. The source advisory explicitly states the unauthenticated privilege-escalation impact and the fixed build. The provided corpus does not include exploit code or a KEV listing, and no active threat/campaign use is recorded in the supplied enrichment.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-5387 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-5387

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

  • CVE-2026-5387 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-5387

    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-26-106-04.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-26-106-04

    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.