CVE-2025-46269 Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, Cobalt Share Heap-based Buffer Overflow

High 8.4 Published 18 Aug 2025 Updated 19 Aug 2025

Attackers can execute arbitrary code by tricking users into opening malicious VC6 files in Ashlar-Vellum CAD applications.

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-2025-46269?

CVE-2025-46269 is a high-severity memory corruption vulnerability in Ashlar Cobalt, published on 18 Aug 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

In Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, and Cobalt Share versions prior to 12.6.1204.204, the affected applications lack proper validation of user-supplied data when parsing VC6 files. This could lead to a heap-based buffer overflow. An attacker could leverage this vulnerability to execute arbitrary code in the context of the current process.

Weakness: CWE-122

Which versions are affected by CVE-2025-46269?

It affects 5 products.

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

How do I fix CVE-2025-46269?

No fix has been published for CVE-2025-46269 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-2025-46269 being exploited?

There is no known exploitation of CVE-2025-46269 in the wild and no public exploit code.

All Ashlar Cobalt vulnerabilities

Sources

Also known as GHSA-2xrm-mj2g-mf72.