CVE-2025-65086

Out-of-bounds write in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, Cobalt Share

Published May 12, 2026 CVSS 4.0 · 8.4 High EPSS < 1% KEV · Not listed
Description
An Out-of-Bounds Write vulnerability is present in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, and Cobalt Share versions 12.6.1204.216 and prior that could allow an attacker to execute arbitrary code when a specially crafted VC6 file is being parsed.

Remediation

Vendor Solution

Ashlar-Vellum recommends users update to build 12.6.1204.217 and later.

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Ashlar
Ashlar argon
Ashlar cobalt
Ashlar cobalt Share
Ashlar lithium
Ashlar xenon
CPEs cpe:2.3:a:ashlar:argon:*:*:*:*:*:*:*:*
cpe:2.3:a:ashlar:cobalt:*:*:*:*:*:*:*:*
cpe:2.3:a:ashlar:cobalt_share:*:*:*:*:*:*:*:*
cpe:2.3:a:ashlar:lithium:*:*:*:*:*:*:*:*
cpe:2.3:a:ashlar:xenon:*:*:*:*:*:*:*:*
Vendors & Products Ashlar
Ashlar argon
Ashlar cobalt
Ashlar cobalt Share
Ashlar lithium
Ashlar xenon
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

Type Values Removed Values Added
First Time appeared Ashlar Vellum
Ashlar Vellum argon
Ashlar Vellum cobalt
Ashlar Vellum cobalt Share
Ashlar Vellum lithium
Ashlar Vellum xenon
Vendors & Products Ashlar Vellum
Ashlar Vellum argon
Ashlar Vellum cobalt
Ashlar Vellum cobalt Share
Ashlar Vellum lithium
Ashlar Vellum xenon
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description An Out-of-Bounds Write vulnerability is present in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, and Cobalt Share versions 12.6.1204.216 and prior that could allow an attacker to execute arbitrary code when a specially crafted VC6 file is being parsed.
Title Out-of-bounds write in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, Cobalt Share
Weaknesses CWE-787
References
Metrics cvssV4_0

{'score': 8.4, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
icscert
Published
Updated
May 12, 2026, 9:12 PM
Reserved
Nov 17, 2025, 4:43 PM
Status
Analyzed
Published
May 12, 2026, 9:16 PM
Modified
Oct 14, 2026, 1:10 PM