CVE-2021-3722
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 · uneditedA denial of service vulnerability was reported in Lenovo PCManager prior to version 4.0.40.2175 that could allow configuration files to be written to non-standard locations during installation.
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 confidenceLenovo PCManager versions before 4.0.40.2175 contain a vulnerability in the installer that allows configuration files to be written to non-standard locations during installation. This improper path validation during the installation process could lead to denial of service by corrupting system files or causing application instability.
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< 4.0.40.2175CVSS 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
- Low
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/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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Check if Lenovo PCManager is installedLook for Lenovo PCManager in the list of installed applications on the system, or check common installation directories such as C:\Program Files\Lenovo\PCManagerAffected if Lenovo PCManager is found on the system
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Determine the installed versionOpen Lenovo PCManager and navigate to the About or Help section to view the version number, or right-click the executable file and select Properties to view version informationAffected if A version number is displayed
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Compare version to the fixed releaseCompare the installed version against 4.0.40.2175 using numeric version comparison (e.g., 4.0.40.2174 or lower is older)Affected if Installed version is less than 4.0.40.2175
The system is affected if Lenovo PCManager is installed with any version lower than 4.0.40.2175, as the installer contains the improper path validation flaw.
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 · scoped4.0.40.2175
Upgrade Lenovo PCManager to version 4.0.40.2175 or later to remediate this vulnerability.
Lenovo PCManager version 4.0.40.2175 or later
- 1. Determine the current installed version of Lenovo PCManager by opening the application and checking About or Help section
- 2. If the version is below 4.0.40.2175, download the latest version of Lenovo PCManager from the official Lenovo support website
- 3. Uninstall the current version of Lenovo PCManager
- 4. Install the updated version (4.0.40.2175 or later)
- 5. Verify the installation completed successfully by checking the version number
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-3722 — 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-2021-3722 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