CVE-2021-38449
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 · uneditedSome API functions permit by-design writing or copying data into a given buffer. Since the client controls these parameters, an attacker could rewrite the memory in any location of the affected product.
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 confidenceAPI functions allow client-controlled parameters to write or copy data into buffers without proper bounds validation, enabling an attacker to perform arbitrary memory writes to any location in the affected product's memory space.
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<= 8.0.0CVSS 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
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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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Confirm Auvesy Versiondog installationLocate the Versiondog installation directory or check system inventory for Auvesy Versiondog softwareAffected if Auvesy Versiondog is installed on the system
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Identify installed Versiondog versionCheck the version information through the product's about dialog, installation logs, or version file in the program directoryAffected if The installed version is 8.0.0 or lower
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Determine if API services are enabledCheck product configuration files or service settings for enabled API interfaces (such as REST API, web services, or remoting endpoints)Affected if API services are enabled and accessible to clients
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Verify network exposure of API endpointsReview network configuration to determine if the API ports are bound to accessible network interfaces rather than localhost onlyAffected if API endpoints are exposed to untrusted network paths
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Check for client-accessible API functionsExamine API documentation or configuration to identify which functions accept client-supplied parameters for write or copy operationsAffected if Client-accessible API functions that handle buffer operations are exposed
The environment is affected if Auvesy Versiondog version 8.0.0 or lower is installed with API services enabled and accessible to client systems.
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.
dbcve · scopedImplement strict input validation and bounds checking on all client-controlled parameters in the affected API functions; consider redesigning the API to avoid direct client-controlled memory writes.
Versiondog > 8.0.0 (contact vendor for exact fixed release)
- Contact Versiondog vendor (WAGO) to obtain the latest fixed version and security patch
- Request specific CVE-2021-38449 remediation details and any available hotfix
- If upgrade is available, test the fixed version in a staging environment before production deployment
- Implement network segmentation to limit exposure to untrusted networks
- Implement input validation and access controls on API endpoints if possible until patch is applied
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation8.0 h
- Implementation24.0 h
- Testing16.0 h
- Review / QA8.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $15,616.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-38449 — 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-2021-38449 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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
- No spam, self-promotion, credentials, or personal data