CVE-2023-39215
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 · uneditedImproper authentication in Zoom clients may allow an authenticated user to conduct a denial of service via network 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 confidenceImproper authentication in Zoom clients allows an authenticated attacker to cause denial of service via network access. The vulnerability stems from insufficient validation during the authentication process, enabling a remote attacker with valid credentials to crash the client or render it unresponsive.
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< 5.15.5< 5.14.12>= 5.15.0, < 5.15.4< 5.15.5CVSS 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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/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 Zoom client versionOpen Zoom desktop client, click your profile picture, then click 'Check for Updates' or look in Help > About Zoom to view the installed version numberAffected if version is below 5.15.5
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Verify Zoom VDI version if applicableFor Virtual Desktop Infrastructure deployments, check the installed VDI client version through your virtual desktop environment's software inventory or Zoom's version diagnostic (typically accessible via the Zoom icon > About)Affected if version is below 5.14.12, or between 5.15.0 and 5.15.4 (exclusive)
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Check Zoom Meeting SDK version if deployedFor custom applications using the Zoom Meeting Software Development Kit, verify the SDK version by checking the application's dependencies or library manifest file that contains the Zoom SDK componentAffected if SDK version is below 5.15.5
A user is affected if their installed Zoom client, VDI, or Meeting SDK version falls within the vulnerable ranges and they have valid Zoom credentials that could be exploited by a remote authenticated attacker.
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 · scoped5.14.125.15.45.15.5
Apply the latest Zoom client updates from the official vendor to patch the authentication flaw. Organizations should enforce client version compliance through endpoint management tools and ensure users cannot bypass update mechanisms.
Meeting SDK and Zoom clients: 5.15.5 or later; VDI: 5.14.12 or later, or 5.15.4 or later for the 5.15.x branch
- For Zoom clients: Download and install Zoom version 5.15.5 or later from official Zoom download sources
- For Meeting Software Development SDK: Integrate Zoom Meeting SDK version 5.15.5 or later into applications
- For Virtual Desktop Infrastructure: Upgrade to version 5.14.12 or later, or version 5.15.4 or later depending on the deployed branch
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation1.0 h
- Implementation2.0 h
- Testing1.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-39215 — 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-2023-39215 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
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