---
id: CVE-2025-7978
title: >-
  Ashlar-Vellum Graphite VC6 File Parsing Uninitialized Variable Remote Code
  Execution Vulnerability
summary: >-
  Ashlar-Vellum Graphite VC6 File Parsing Uninitialized Variable Remote Code
  Execution Vulnerability. This vulnerability allows remote attackers to execute
  arbitrary code on affected installations of Ashlar-Vellum Graphite. User
  interactio…
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-457
vendor: ashlar
product: graphite
affected:
  - graphite = 13.0.48
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-2025-7978'
references:
  - url: 'https://www.zerodayinitiative.com/advisories/ZDI-25-632/'
    label: zdi-disclosures@trendmicro.com
tags:
  - nvd
epss: 0.00234
epssPercentile: 0.12747
zeroDay: true
ingestedAt: '2026-09-26T00:22:39.936Z'
---

## Overview

Ashlar-Vellum Graphite VC6 File Parsing Uninitialized Variable Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Ashlar-Vellum Graphite. 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 VC6 files. The issue results from the lack of proper initialization of memory prior to accessing it. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-25459.

## Affected

- `graphite = 13.0.48`

## Remediation

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