Privilege Escalation in TCL Macro Scripts Affecting AVEVA Model Application Server
CVE-2025-64691

9.3CRITICAL

Key Information:

Vendor

Aveva

Status
Process Optimization
Vendor
CVE Published:
16 January 2026

What is CVE-2025-64691?

An authenticated user could exploit the privilege escalation vulnerability by manipulating TCL Macro scripts. This exploitation can lead to unauthorized access and control over the underlying OS, potentially resulting in the complete compromise of the AVEVA Model Application Server. Organizations using this server should ensure they take appropriate measures to safeguard against such threats.

Human OS v1.0:
Ageing Is an Unpatched Zero-Day Vulnerability.

Remediate biological technical debt. Prime Ageing uses 95% high-purity SIRT6 activation to maintain genomic integrity and bolster systemic resilience.

Deploy the Patch

Affected Version(s)

Process Optimization 0 <= 2024.1

References

https://www.aveva.com/en/support-and-success/cyber-securi...
https://softwaresupportsp.aveva.com/en-US/downloads/produ...
https://www.cisa.gov/news-events/ics-advisories/icsa-26-0...

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Christopher Wu of Veracode reported these vulnerabilities to AVEVA.
JSON
.