Workplace DesktopApplication · Zoom
CVE-2025-30663
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 · uneditedTime-of-check time-of-use race condition in some Zoom Workplace Apps may allow an authenticated user to conduct an escalation of privilege via local access.
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 confidenceA time-of-check time-of-use (TOCTOU) race condition exists in certain Zoom Workplace Apps that allows an authenticated local user to escalate privileges. The vulnerability occurs when the application checks a condition but the state changes before the check result is used, allowing privilege escalation.
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
Workplace DesktopApplication
< 6.4.0< 6.4.0< 6.4.0< 6.4.0< 6.4.0< 6.1.17>= 6.1.18, < 6.2.13>= 6.2.14, < 6.3.10CVSS 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
- High
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:H/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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Identify installed Zoom productCheck Programs and Features (Windows), Applications folder (Mac), or package manager (Linux) for Zoom Workplace Desktop, Zoom Rooms, Zoom Rooms Controller, or Zoom Meeting SDK installationsAffected if Any Zoom product from the affected list is installed
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Check Zoom Workplace Desktop versionOpen Zoom Desktop app, click your profile picture or Help > About Zoom Desktop to view the version numberAffected if Version shown is below 6.4.0 (for example, 6.3.10, 6.2.0, etc.)
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Check Zoom Rooms versionOn the Zoom Rooms controller or room display, navigate to Settings > About or Rooms > Room Info to find the versionAffected if Version shown is below 6.4.0
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Check Zoom Workplace VDI versionConsult your VDI administrator or check the installed VDI client version through the virtual desktop environmentAffected if Version is below 6.1.17, OR between 6.1.18 and 6.2.12 inclusive, OR between 6.2.14 and 6.3.9 inclusive
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Verify local user access existsConfirm that non-administrator local user accounts exist on the system where Zoom is installedAffected if The system allows authenticated local users (potential attackers) to interact with Zoom processes
If any Zoom product listed in the affected versions is installed and its version falls below the safe thresholds, the environment is vulnerable to local privilege escalation via this TOCTOU race condition.
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 · scoped6.1.176.2.136.3.10
Apply the vendor-supplied patch or update to Zoom Workplace Apps to the latest version. This is a client-side application fix; there are no network-level mitigations.
Upgrade to Zoom Workplace version 6.4.0 or later for all affected products
- Identify the specific Zoom product in use (Workplace Desktop, Meeting SDK, Rooms, Rooms Controller, Workplace, or Workplace VDI)
- Determine the current installed version using About or version check functionality
- For Workplace Desktop, Meeting SDK, Rooms, Rooms Controller, and Workplace: Upgrade to version 6.4.0 or later
- For Workplace Virtual Desktop Infrastructure: Upgrade to version 6.4.0 or later (this version addresses all earlier vulnerable ranges: 6.1.x < 6.1.17, 6.1.18-6.2.12, and 6.2.14-6.3.9)
- Verify the upgrade was successful by checking the new version number
Generated from the published advisory — verify against the referenced sources before acting.
Fix this in Workplace Desktop
Scoped from the published advisory
- Consultation2.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,408.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-30663 — 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-2025-30663 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