Code execution via crafted VC6 file parsing
Published May 12, 2026 · Updated May 12, 2026
Out-of-bounds write in Ashlar-Vellum CAD applications 12.6.1204.216 and earlier allows attackers to execute code via a crafted VC6 file. The published advisory identifies the VC6 parser as the locus but does not disclose which field or length calculation causes the out-of-bounds write. Exploitation requires a user to open a malicious file; successful memory corruption runs attacker-controlled code in the application's context.
Summary
What happened
Out-of-bounds write in Ashlar-Vellum CAD applications 12.6.1204.216 and earlier allows attackers to execute code via a crafted VC6 file. The published advisory identifies the VC6 parser as the locus but does not disclose which field or length calculation causes the out-of-bounds write. Exploitation requires a user to open a malicious file; successful memory corruption runs attacker-controlled code in the application's context.
The record
- CVE
- CVE-2025-65086
- Published
- May 12, 2026
- Updated
- May 12, 2026
- Vendor
- Ashlar-Vellum
- Product
- Cobalt
- Classifications
- CWE-787, T1204.002, T1203
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 12, 2026CVE publishedPublication date reported by the CVE source.
- May 12, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=12.6.1204.216
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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