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High severity · published Jan 16, 2026
CVE-2025-64691
AVEVA Process Optimization Code Injection
8.8
CVSS
0.3%
EPSS
No
On KEV
Description
The vulnerability, if exploited, could allow an authenticated miscreant (OS standard user) to tamper with TCL Macro scripts and escalate privileges to OS system, potentially resulting in complete compromise of the model application server.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 21% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PO
Process Optimization · AVEVA
through 2024.1 · source: vendor, NVD
Affected product
PO
Process Optimization
AVEVA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-64691
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-64691
Third Party Advisory
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-015-01.json
Permissions Required
https://softwaresupportsp.aveva.com/en-US/downloads/products/details/a643eaa3-0d85-4fde-ac11-5239e87a68ea
Vendor Advisory
https://www.aveva.com/en/support-and-success/cyber-security-updates/
Third Party Advisory
https://www.cisa.gov/news-events/ics-advisories/icsa-26-015-01
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