CVE-2025-11465 HIGH

CVE-2025-11465: Ashlar-Vellum Cobalt CO File Parsing Use-After-Free Remote Code Execution Vulnerability

Vendor Ashlar-Vellum
Product Cobalt
Weakness CWE-416
Published October 29, 2025
Last update October 30, 2025

CVSS base score

7.8/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality High
Integrity High

CVSS vector

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

Ashlar-Vellum Cobalt CO File Parsing Use-After-Free 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 validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-26631.

Key dates

02Disclosure timeline

October 29, 2025 CVE published
October 30, 2025 Record updated