CVE-2025-65087
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedAn Out-of-Bounds Read vulnerability is present in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, and Cobalt Share versions 12.6.1204.216 and prior that could allow an attacker to disclose information or execute arbitrary code when a specially crafted VC6 file is being parsed.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceAn out-of-bounds read vulnerability exists in the VC6 file parser of Ashlar-Vellum CAD software (Cobalt, Xenon, Argon, Lithium, Cobalt Share versions 12.6.1204.216 and prior). Processing a specially crafted malicious VC6 file can lead to information disclosure or arbitrary code execution.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data<= 12.6.1204.216<= 12.6.1204.216<= 12.6.1204.216<= 12.6.1204.216<= 12.6.1204.216CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Local
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify installed Ashlar-Vellum productOpen the application and check the About/Help menu, or locate the executable (Cobalt.exe, Xenon.exe, Argon.exe, Lithium.exe) in Program Files and check its properties for version informationAffected if Any of the five Ashlar-Vellum products (Cobalt, Xenon, Argon, Lithium, Cobalt Share) is installed
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Determine the exact version numberWithin the application, go to Help > About or right-click the executable > Properties > Details to find the File Version. Compare it to 12.6.1204.216Affected if Version is 12.6.1204.216 or lower
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Verify VC6 file support is presentCheck if the application can import or open VC6 files. Look for VC6 in the supported file types (File > Open, File > Import dialogs) or check Help > Supported File FormatsAffected if VC6 format is listed as a supported import type and the feature is available for use
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Confirm VC6 parser is enabled by defaultAttempt to open a VC6 file or check the file associations. The vulnerability triggers upon processing a VC6 file, so the parser being present is the attack surfaceAffected if VC6 files can be opened, imported, or parsed by the application without additional configuration changes
The user is affected if they have any Ashlar-Vellum product version 12.6.1204.216 or lower installed with VC6 file parsing capability available.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataApply vendor-supplied patch when available; avoid opening VC6 files from untrusted sources until the software is updated.
- Consultation2.0 h
- Implementation1.0 h
- Testing4.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2025-65087 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-65087 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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