---
id: CVE-2025-7993
title: >-
  Ashlar-Vellum Cobalt LI File Parsing Use-After-Free Remote Code Execution
  Vulnerability
summary: >-
  Ashlar-Vellum Cobalt LI 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…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-416
vendor: ashlar
product: cobalt
affected:
  - cobalt = 12.0.1204.91
published: '2025-09-17'
updated: '2026-09-26'
sourceUpdated: '2026-09-26T00:10:00.127'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-7993'
references:
  - url: 'https://www.zerodayinitiative.com/advisories/ZDI-25-726/'
    label: zdi-disclosures@trendmicro.com
tags:
  - nvd
epss: 0.00218
epssPercentile: 0.10866
zeroDay: true
ingestedAt: '2026-09-26T00:22:39.941Z'
---

## Overview

Ashlar-Vellum Cobalt LI 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 LI 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-25355.

## Affected

- `cobalt = 12.0.1204.91`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.