ZDI-25-641: (0Day) Ashlar-Vellum Graphite VC6 File Parsing Out-Of-Bounds Write 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 validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.
Other sources
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 ZDI has assigned a CVSS rating of 7.8. The following CVEs are assigned: CVE-2025-7987.
— ZDI
Affected Software
Event History
Frequently Asked Questions
What is the severity of ZDI-25-641?
ZDI-25-641 is classified as a critical vulnerability due to its potential for remote code execution.
How do I fix ZDI-25-641?
To fix ZDI-25-641, ensure that you update Ashlar-Vellum Graphite to the latest patched version provided by the vendor.
What causes ZDI-25-641?
ZDI-25-641 is caused by improper handling of user-supplied input when processing files or web pages.
Is user interaction required to exploit ZDI-25-641?
Yes, user interaction is required as the victim must open a malicious file or visit a malicious web page for exploitation.
What systems are affected by ZDI-25-641?
ZDI-25-641 affects installations of Ashlar-Vellum Graphite, specifically older versions prior to the security update.