CVE-2025-7985

Ashlar-Vellum Cobalt VC6 File Parsing Integer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Ashlar-Vellum Cobalt. 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 an integer overflow before allocating a buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-25704.

Score

CVSS 3.0 7.8 High

Status

Analyzed - zdi-disclosures@trendmicro.com

Published

2025-09-17

Last modified

2025-09-18

Weaknesses

CWE-190

Affected products

• Cobalt (Ashlar)
• Cobalt (Ashlar-vellum)

References

• https://www.zerodayinitiative.com/advisories/ZDI-25-637/