# CVE-2025-11464: Ashlar-Vellum Cobalt CO File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This…

Source: https://junglewise.ai/threats/cve-2025-11464-ashlar-vellum-cobalt-co-file-parsing-heap-based-buffer-overflow  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-10-29  
License: CC BY 4.0 with a link back

CVE-2025-11464 · Severity: high · CVSS 7.8 · Published 2025-10-29

Ashlar-Vellum Cobalt CO File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Ashlar-Vellum Cobalt. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the parsing of CO files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-26628.

Technologies: [Ashlar Cobalt](https://junglewise.ai/threats/technologies/cobalt). Vendors: [Ashlar](https://junglewise.ai/threats/vendors/ashlar).

## Quick answers

**Is CVE-2025-11464 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-11464 being exploited in the wild.

**How severe is CVE-2025-11464?** High severity, with a CVSS score of 7.8, published 29 October 2025.

**Which products and versions are affected?** Ashlar Cobalt. The advisory does not name versions.

**Is there a fix for CVE-2025-11464?** 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.

**Am I affected by CVE-2025-11464?** Check whether you run Ashlar Cobalt. 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.

## Affected products

- Ashlar Cobalt

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