PT-2026-3195 · Tcl · Tcl

Christopher Wu · Published 2026-01-13 · Updated 2026-01-22 · CVE-2025-64691

Positive Technologies (AI Summary)

CVSS v4.0

9.3

Critical

Base vector

AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions versions prior to 2025 (affected versions not specified)

Description An authenticated user with standard operating system privileges could modify TCL Macro scripts. Successful exploitation may lead to privilege escalation to the operating system level, potentially resulting in a full system compromise of the application server.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Code Injection

Weakness Enumeration

CWE-94

Related Identifiers

BDU:2026-00496

CVE-2025-64691

Affected Products

Tcl

References · 10

• https://nvd.nist.gov/vuln/detail/CVE-2025-64691 · Security Note
• https://osv.dev/vulnerability/CVE-2025-64691 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-00496 · Security Note
• https://aveva.com/en/support-and-success/cyber-security-updates · Vendor Advisory
• https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-015-01.json · Note
• https://t.me/cveNotify/149565 · Telegram Post
• https://softwaresupportsp.aveva.com/en-US/downloads/products/details/a643eaa3-0d85-4fde-ac11-5239e87a68ea · Note
• https://cisa.gov/news-events/ics-advisories/icsa-26-015-01 · Note
• https://twitter.com/CVEnew/status/2012126468684280215 · Twitter Post
• https://aveva.com/content/dam/aveva/documents/support/cyber-security-updates/SecurityBulletin_AVEVA-2026-001.pdf · Note