Ashlar-Vellum Graphite VC6 File Parser out-of-bounds write

Summaryinfo

A vulnerability was found in Ashlar-Vellum Graphite. It has been declared as critical. The impacted element is an unknown function of the component VC6 File Parser. Executing a manipulation can lead to out-of-bounds write. This vulnerability is tracked as CVE-2025-7986. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Ashlar-Vellum Graphite (version now known). It has been declared as critical. This vulnerability affects some unknown processing of the component VC6 File Parser. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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. Was ZDI-CAN-25755.

The advisory is available at zerodayinitiative.com. This vulnerability was named CVE-2025-7986. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 09/18/2025).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Ashlar-Vellum

Name

• Graphite

License

• commercial

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