CVE-2020-29492
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 · uneditedDell Wyse ThinOS 8.6 and prior versions contain an insecure default configuration vulnerability. A remote unauthenticated attacker could potentially exploit this vulnerability to access the writable file and manipulate the configuration of any target specific station.
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 confidenceDell Wyse ThinOS 8.6 and prior versions contain an insecure default configuration that allows a remote unauthenticated attacker to access a writable file and manipulate the configuration of any target thin client station. This is a critical vulnerability due to the complete lack of authentication required for exploitation and the ability to modify system configuration.
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<= 8.6CVSS 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
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
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 ThinOS versionAccess the ThinOS system information panel or check the firmware/build version through the thin client management interface or startup diagnosticsAffected if The installed version is 8.6 or any prior version (anything <= 8.6)
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Locate the configuration file controlling remote accessIdentify the configuration file or registry setting that governs thin client management interface access permissions - typically found in the system configuration directory or WDM/FTP configuration storageAffected if A writable configuration file exists that controls access to the thin client management features
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Verify authentication requirements on management interfaceExamine the configuration setting that controls whether authentication is required for remote configuration access - look for parameters like 'EnableAnonymousAccess', 'RequireAuthentication', or similar access control settingsAffected if The configuration allows unauthenticated (anonymous) write access to modify thin client settings
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Check write permissions on configuration storageVerify that the configuration file or directory where thin client settings are stored has write permissions that could be exploited remotely without credentialsAffected if The configuration storage is writable and accessible without authentication
A user is affected if their ThinOS version is 8.6 or prior AND the default configuration allows unauthenticated remote access to modify thin client settings.
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 dataRemediate by upgrading to a patched version of ThinOS if available, or by changing the insecure default configuration settings to disable unauthenticated access and restrict write permissions to the configuration file.
- Consultation4.0 h
- Implementation16.0 h
- Testing8.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $8,960.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-29492 — 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-2020-29492 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