ZDI-CAN-25756: 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-CAN-25756?
ZDI-CAN-25756 has a high severity rating due to its ability to allow remote code execution on affected installations of Ashlar-Vellum Graphite.
How do I fix ZDI-CAN-25756?
To fix ZDI-CAN-25756, ensure that your Ashlar-Vellum Graphite software is updated to the latest version provided by the vendor.
What are the effects of ZDI-CAN-25756 if exploited?
If exploited, ZDI-CAN-25756 can allow an attacker to execute arbitrary code, which may lead to full system compromise.
Is user interaction required to exploit ZDI-CAN-25756?
Yes, user interaction is required to exploit ZDI-CAN-25756, as the target must either visit a malicious webpage or open a malicious file.
What versions of Ashlar-Vellum Graphite are affected by ZDI-CAN-25756?
ZDI-CAN-25756 affects all installations of Ashlar-Vellum Graphite that have not been patched against this vulnerability.