Quick answers
- Is CVE-2025-65086 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2025-65086 being exploited in the wild.
- How severe is CVE-2025-65086?
- Informational severity, with a CVSS score of 8.4, published 12 May 2026.
- 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-2025-65086?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2025-65086 attacked?
- It is attacked with local access, in a network appliance.
- Am I affected by CVE-2025-65086?
- Check whether anything you run is named in the advisory. 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
An out-of-bounds write vulnerability (CWE-787) exists in multiple Ashlar-Vellum products, including Cobalt, Xenon, Argon, Lithium, and Cobalt Share. The flaw is triggered during the parsing of VC6 files. An attacker can exploit this by providing a specially crafted file to a user; when the application attempts to process the file, it writes data outside the intended buffer boundaries. This can lead to arbitrary code execution in the context of the current user. The vulnerability requires user interaction (opening a file) and is accessible via a local attack vector. Ashlar-Vellum recommends updating to build 12.6.1204.217 or later to remediate the issue.
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
- 2026-05-12: advisory: CISA ICS Advisory ICSA-25-329-01 published
- 2026-05-12: disclosed: CVE-2025-65086 published to NVD