PT-2026-40428 · Ashlar Vellum · Lithium+4

Published 2026-05-12 · Updated 2026-05-12 · CVE-2025-65086

Positive Technologies (AI Summary)

CVSS v4.0

8.4

High

Base vector

AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions Ashlar-Vellum Cobalt versions prior to 12.6.1204.217 Ashlar-Vellum Xenon versions prior to 12.6.1204.217 Ashlar-Vellum Argon versions prior to 12.6.1204.217 Ashlar-Vellum Lithium versions prior to 12.6.1204.217 Ashlar-Vellum Cobalt Share versions prior to 12.6.1204.217

Description An Out-of-Bounds Write occurs when a specially crafted VC6 file is parsed, which could allow an attacker to execute arbitrary code. Out-of-Bounds Write is a condition where software writes data past the end or before the beginning of the intended memory buffer.

Recommendations Update Cobalt, Xenon, Argon, Lithium, and Cobalt Share to a version later than 12.6.1204.216.

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2025-65086

Affected Products

Argon

Cobalt

Cobalt Share

Lithium

Xenon

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2025-65086 · Security Note
• https://twitter.com/CVEnew/status/2054324021697908999 · Twitter Post
• https://cisa.gov/news-events/ics-advisories/icsa-25-329-01 · Note