CVE-2021-34411
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 · uneditedDuring the installation process forZoom Rooms for Conference Room for Windows before version 5.3.0 it is possible to launch Internet Explorer with elevated privileges. If the installer was launched with elevated privileges such as by SCCM this can result in a local privilege escalation.
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 confidenceDuring Zoom Rooms for Conference Room for Windows installation (versions before 5.3.0), when the installer runs with elevated privileges (such as via SCCM deployment), Internet Explorer is launched with those same elevated privileges. This allows a local attacker to potentially execute code at administrator/SYSTEM privilege levels.
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< 5.3.0CVSS 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
- Local
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:L/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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Verify Zoom Rooms for Conference Room for Windows is installedOpen Windows Control Panel > Programs and Features, or run 'Get-WmiObject -Class Win32_Product' in PowerShell, and look for 'Zoom Rooms' or 'Zoom Rooms for Conference Room' in the installed programs listAffected if The program is listed in installed programs
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Determine the installed version of Zoom RoomsRight-click on the Zoom Rooms entry in Programs and Features and select Properties, or check the version in the application itself by clicking Help > About Zoom Rooms, or query the Windows Installer database for the product versionAffected if The version displayed is lower than 5.3.0 (for example, 5.2.x, 5.1.x, or earlier)
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Confirm the installation method used elevated privilegesReview deployment documentation or check SCCM/management tool logs to determine if the installer was deployed with elevated privileges or run as administratorAffected if The installer was run with elevated privileges (as administrator or via SCCM/system deployment)
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Check for presence of Internet Explorer spawned during installationReview installation logs or event logs for evidence of iexplore.exe processes launched during the Zoom Rooms installation processAffected if Internet Explorer was launched with elevated (administrator/SYSTEM) privileges during installation
You are affected if Zoom Rooms for Conference Room for Windows version 5.3.0 or later is NOT installed and the installer was run with elevated privileges.
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 · scoped5.3.0
Upgrade to Zoom Rooms for Conference Room for Windows version 5.3.0 or later. If immediate patching is not possible, avoid running the installer with elevated privileges unless necessary, and ensure proper deployment controls are in place.
Zoom Rooms for Conference Room for Windows version 5.3.0 or later
- 1. Verify the current Zoom Rooms for Conference Room for Windows version by checking Help > About Zoom Rooms
- 2. Download Zoom Rooms version 5.3.0 or later from the official Zoom download center or your Zoom Room controller
- 3. If the installer is managed by SCCM or similar deployment tools, ensure the deployment package is updated to version 5.3.0 or later
- 4. Deploy the updated installer to the conference room Windows machines
- 5. Restart the Zoom Rooms service after installation completes
- 6. Verify the installed version shows 5.3.0 or higher
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation2.0 h
- Testing3.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-34411 — 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-2021-34411 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
- No spam, self-promotion, credentials, or personal data