# CVE-2025-65085: Ashlar-Vellum CAD Products heap-based buffer overflow

Source: https://junglewise.ai/threats/cve-2025-65085-ashlar-vellum-cad-products-heap-based-buffer-overflow  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-11-25. Updated: 2026-05-12  
License: CC BY 4.0 with a link back

CVE-2025-65085 · Severity: critical · CVSS 9.8 · Published 2025-11-25

Ashlar-Vellum CAD and 3D modeling software products are affected by a security flaw that could allow an attacker to take control of a computer or steal sensitive information. This occurs when the software processes a specially crafted file, potentially leading to a system crash or unauthorized code execution. Users are advised to update to the latest version to protect their design data and operational integrity.

Technologies: [Ashlar Argon](https://junglewise.ai/threats/technologies/argon), [Ashlar Cobalt](https://junglewise.ai/threats/technologies/cobalt), [Ashlar Cobalt Share](https://junglewise.ai/threats/technologies/cobalt-share), [Ashlar Lithium](https://junglewise.ai/threats/technologies/lithium), [Ashlar Xenon](https://junglewise.ai/threats/technologies/xenon). Vendors: [Ashlar](https://junglewise.ai/threats/vendors/ashlar).

## Quick answers

**Is CVE-2025-65085 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-65085 being exploited in the wild.

**How severe is CVE-2025-65085?** Critical severity, with a CVSS score of 9.8, published 25 November 2025.

**Which products and versions are affected?** Ashlar-Vellum Cobalt <= 12.6.1204.216; Ashlar-Vellum Xenon <= 12.6.1204.216; Ashlar-Vellum Argon <= 12.6.1204.216; Ashlar-Vellum Lithium <= 12.6.1204.216; and 1 more.

**Is there a fix for CVE-2025-65085?** A patch was published on 2026-05-12: Advisory updated to reflect patch version 12.6.1204.217 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2025-65085 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2025-65085?** Check whether you run Ashlar Argon, Ashlar Cobalt, Ashlar Cobalt Share or one of the others listed. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A heap-based buffer overflow (CWE-122) exists in multiple Ashlar-Vellum products, including Cobalt, Xenon, Argon, Lithium, and Cobalt Share. The vulnerability is triggered when the application processes malformed data, leading to memory corruption. An attacker can exploit this by enticing a user to open a specially crafted file, potentially resulting in arbitrary code execution or sensitive information disclosure. The attack requires local access and user interaction. Ashlar-Vellum recommends updating to build 12.6.1204.217 or later to mitigate this risk.

## Affected products

- Ashlar-Vellum Cobalt <= 12.6.1204.216
- Ashlar-Vellum Xenon <= 12.6.1204.216
- Ashlar-Vellum Argon <= 12.6.1204.216
- Ashlar-Vellum Lithium <= 12.6.1204.216
- Ashlar-Vellum Cobalt Share <= 12.6.1204.216

## Timeline

- 2025-11-25: disclosed
- 2025-11-25: advisory
- 2026-05-12: patched: Advisory updated to reflect patch version 12.6.1204.217

## References

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

## Related threats

- [Ashlar-Vellum CAD Software Out-of-Bounds Write](https://junglewise.ai/threats/cve-2025-65084-ashlar-vellum-cad-software-out-of-bounds-write)
- [Ashlar-Vellum Cobalt CO File Parsing Use-After-Free Remote Code Execution Vulnerability. This vulnerability allows…](https://junglewise.ai/threats/cve-2025-11465-ashlar-vellum-cobalt-co-file-parsing-use-after-free-remote-code)
- [Ashlar-Vellum Cobalt CO File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This…](https://junglewise.ai/threats/cve-2025-11464-ashlar-vellum-cobalt-co-file-parsing-heap-based-buffer-overflow)
- [Ashlar-Vellum Cobalt XE File Parsing Integer Overflow Remote Code Execution Vulnerability. This vulnerability allows…](https://junglewise.ai/threats/cve-2025-11463-ashlar-vellum-cobalt-xe-file-parsing-integer-overflow-remote-code)