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PatchSiren cyber security CVE debrief

CVE-2025-64729 AVEVA CVE debrief

CVE-2025-64729 is a high-severity AVEVA Process Optimization vulnerability disclosed by CISA on 2026-01-15. According to the advisory, an authenticated OS standard user could tamper with Process Optimization project files, embed code, and then escalate privileges to the identity of a victim user who later interacts with those files. AVEVA’s guidance centers on updating to the fixed release and hardening file and network access controls around the affected service and project data.

Vendor
AVEVA
Product
Process Optimization
CVSS
HIGH 8.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-01-15
Original CVE updated
2026-01-15
Advisory published
2026-01-15
Advisory updated
2026-01-15

Who should care

Organizations using AVEVA Process Optimization, especially teams responsible for OT/ICS engineering workstations, project-file handling, and Windows access control on systems where multiple users can create, modify, distribute, or open Process Optimization project files.

Technical summary

The advisory describes a local, authenticated attack path with low privileges and required user interaction. The supplied CVSS vector (AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L) indicates the issue can cross security boundaries and has strong confidentiality and integrity impact. CISA’s summary focuses on tampering with project files, code embedding, and privilege escalation when a victim later interacts with the modified files.

Defensive priority

High. The combination of authenticated access, project-file tampering, potential code embedding, and privilege escalation makes this a priority for environments that rely on shared Process Optimization project workflows.

Recommended defensive actions

  • Update AVEVA Process Optimization to v2025 using the vendor-provided fix.
  • Restrict the taoimr service with host and/or network firewall rules so it accepts traffic only from trusted sources; by default, the product listens on ports 8888/8889 (TLS).
  • Apply ACLs to installation and data folders so only trusted users can write to them.
  • Maintain a trusted chain of custody for Process Optimization project files during creation, modification, distribution, backups, and use.
  • Review AVEVA’s security bulletin AVEVA-2026-001 for any additional vendor guidance.

Evidence notes

This debrief is based on the CISA CSAF advisory ICSA-26-015-01 (published 2026-01-15, initial republication of AVEVA-2026-001), the embedded vendor remediation guidance, and the supplied CVSS vector/score. No KEV listing was provided in the source corpus.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-64729 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-64729

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

  • CVE-2025-64729 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-64729

    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-26-015-01.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-26-015-01

    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/uscert/sites/default/files/publications/emailscams0905.pdf

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/uscert/ncas/tips/ST04-014

    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.