CVE-2025-65085 Heap-based Buffer Overflow in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, Cobalt Share

High 8.4 Published 25 Nov 2025 Updated 12 May 2026

Heap-based buffer overflow in Ashlar-Vellum CAD applications allows attackers to execute arbitrary code or disclose information.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2025-65085?

CVE-2025-65085 is a high-severity memory corruption vulnerability in Ashlar Cobalt, published on 25 Nov 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

A Heap-based Buffer Overflow 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 disclose information or execute arbitrary code.

Weakness: CWE-122

Which versions are affected by CVE-2025-65085?

It affects 5 products.

Products include Ashlar Argon, Ashlar Cobalt, Ashlar Cobalt Share, Ashlar Lithium, Ashlar Xenon.

How do I fix CVE-2025-65085?

No fix has been published for CVE-2025-65085 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2025-65085 being exploited?

There is no known exploitation of CVE-2025-65085 in the wild and no public exploit code.

All Ashlar Cobalt vulnerabilities

Sources

Also known as GHSA-frm4-p95x-pr4g.