Home/CVE/The vulnerability, if exploited, could allow an authenticated miscreant (OS standard user) to tamper with TCL Macro scr
CVE

CVE-2025-64691

The vulnerability, if exploited, could allow an authenticated miscreant (OS standard user) to tamper with TCL Macro scr

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.

HIGH · CVSS 8.8 EPSS 0.00015
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-94Improper Control of Generation of Code ('Code Injection')
▤

Affected Products & Versions

1
aveva process optimization< 2025
▣

Scoring & Timeline

8.8
HIGH · CVSS v3.1 · ics-cert@hq.dhs.gov
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD16 Jan 2026 · 02:16 AM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

1
cisa-csafcisa-csaf-csaf_files-OT-white-2026-icsa-26-015-01
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-015-01.jsonThird Party Advisory
https://softwaresupportsp.aveva.com/en-US/downloads/products/details/a643eaa3-0d85-4fde-ac11-5239e87a68eaPermissions Required
https://www.aveva.com/en/support-and-success/cyber-security-updates/Vendor Advisory
https://www.cisa.gov/news-events/ics-advisories/icsa-26-015-01Third Party AdvisoryUS Government Resource
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