Out-of-Bounds Write Vulnerability in Ashlar-Vellum Cobalt and Related Products
CVE-2025-65086

8.4HIGH

Key Information:

Vendor

Ashlar-vellum

Status
Cobalt
Xen Projecton
Argon
Lithium
Vendor
CVE Published:
12 May 2026

What is CVE-2025-65086?

An Out-of-Bounds Write vulnerability exists in versions of Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, and Cobalt Share prior to 12.6.1204.216. This flaw can enable an attacker to execute arbitrary code when a specially crafted VC6 file is parsed, posing significant security risks to users.

Affected Version(s)

Argon 0 <= 12.6.1204.216

Cobalt 0 <= 12.6.1204.216

Cobalt Share 0 <= 12.6.1204.216

References

https://www.cisa.gov/news-events/ics-advisories/icsa-25-3...
government-resource

CVSS V4

Score:
8.4
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Michael Heinzl reported these vulnerabilities to CISA.
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