CVE-2025-8002
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 · uneditedAshlar-Vellum Cobalt CO File Parsing Type Confusion 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 CO files. The issue results from the lack of proper validation of user-supplied data, which can result in a type confusion condition. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-26233.
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 · high confidenceA type confusion vulnerability exists in Ashlar-Vellum Cobalt's CO file parser due to insufficient validation of user-supplied data during file parsing. An attacker can craft a malicious CO file that exploits this type confusion to achieve arbitrary code execution within the context of the current process.
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 dataall versionsCVSS 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:3.0/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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Verify Ashlar Cobalt installationCheck for the presence of Ashlar Cobalt software: look for installation directory (commonly C:\Program Files\Ashlar or C:\Program Files\Ashlar-Vellum), check installed programs list, or look for running process 'Cobalt.exe' in task managerAffected if Ashlar Cobalt is installed on the system
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Confirm CO file parsing capabilityCheck if the CO file type association exists: look for .co file extension registration in Windows Registry under HKEY_CLASSES_ROOT\.co or check for recent .co files in user directories (Documents, Downloads, Recent folder)Affected if CO file type is registered or .co files have been opened recently
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Identify CO file parser componentExamine the Cobalt installation directory for the CO parser DLL/module (typically named 'COParser.dll', 'CobaltParser.dll', or similar file handling components in the application bin folder)Affected if CO file parsing module exists within the Cobalt installation
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Check for recent CO file activityReview Windows Event Logs under Security or Application logs for recent .co file access events, or inspect the application's recent files list if accessibleAffected if CO files have been opened or processed by the application
User is affected if Ashlar Cobalt is installed and the CO file parser feature is present or has been used to open CO files, since all versions of Ashlar Cobalt contain the vulnerable CO file parser.
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 dataRestrict opening of untrusted CO files and implement strict type validation in the CO file parsing logic to ensure proper handling of user-supplied data structures.
- Consultation3.0 h
- Implementation6.0 h
- Testing5.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,752.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-8002 — 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-2025-8002 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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- Version or environment caveats, and links to real fixes
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