ZDI-25-639: (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-2025-7986.
— ZDI
Affected Software
Event History
Frequently Asked Questions
What is the severity of ZDI-25-639?
The severity of ZDI-25-639 is high, as it allows remote code execution on affected installations.
How do I fix ZDI-25-639?
To fix ZDI-25-639, update Ashlar-Vellum Graphite to the latest version provided by the vendor.
What software is affected by ZDI-25-639?
ZDI-25-639 affects Ashlar-Vellum Graphite.
Is user interaction required to exploit ZDI-25-639?
Yes, user interaction is required as the target must visit a malicious page or open a malicious file.
Can ZDI-25-639 lead to data loss?
Yes, exploiting ZDI-25-639 could potentially lead to data loss due to arbitrary code execution.