Integer Overflow Vulnerability in Ashlar-Vellum Cobalt VC6 File Parsing
CVE-2025-7985

7.8HIGH

Key Information:

Vendor

Ashlar-vellum

Status
Cobalt
Vendor
CVE Published:
17 September 2025

What is CVE-2025-7985?

A vulnerability exists in Ashlar-Vellum Cobalt's VC6 file parsing that permits remote attackers to execute arbitrary code. This flaw arises from inadequate validation of user-supplied data, leading to an integer overflow before buffer allocation. An attacker can exploit this vulnerability by convincing a user to visit a malicious webpage or open a compromised VC6 file, executing code within the context of the current process.

Affected Version(s)

Cobalt 1204.96

References

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

CVSS V3.0

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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CVE-2025-7985 : Integer Overflow Vulnerability in Ashlar-Vellum Cobalt VC6 File Parsing