CVE-2025-65086 PUBLISHED

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

Assigner: icscert
Reserved: 17.11.2025 Published: 12.05.2026 Updated: 12.05.2026

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.

Metrics

CVSS 4.0

CVSS 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
CVSS Score: 8.4

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Local	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	Active

CVSS 4.0

Product Status

Vendor	Ashlar-Vellum
Product	Cobalt
Versions	Default: unaffected affected from 0 to 12.6.1204.216 (incl.)

Vendor	Ashlar-Vellum
Product	Xenon
Versions	Default: unaffected affected from 0 to 12.6.1204.216 (incl.)

Vendor	Ashlar-Vellum
Product	Argon
Versions	Default: unaffected affected from 0 to 12.6.1204.216 (incl.)

Vendor	Ashlar-Vellum
Product	Lithium
Versions	Default: unaffected affected from 0 to 12.6.1204.216 (incl.)

Vendor	Ashlar-Vellum
Product	Cobalt Share
Versions	Default: unaffected affected from 0 to 12.6.1204.216 (incl.)

Solutions

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

Credits

Michael Heinzl reported these vulnerabilities to CISA. finder

References

https://www.cisa.gov/news-events/ics-advisories/icsa-25-329-01

Problem Types

CWE-787 Out-of-bounds write CWE