CVE-2025-46789
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 · uneditedClassic buffer overflow in certain Zoom Clients for Windows may allow an authorized 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 confidenceA classic buffer overflow vulnerability exists in specific versions of Zoom Client for Windows. The flaw is network-accessible and requires an authorized (authenticated) user to trigger, resulting in denial of service. The vulnerability stems from improper bounds checking during network communication processing within the client application.
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 dataall versionsCVSS 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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Verify Zoom Client for Windows is installedCheck for Zoom installation directory at C:\Users\%USERNAME%\AppData\Roaming\Zoom or C:\Program Files\Zoom or look for Zoom.exe in the systemAffected if Zoom Client for Windows is present on the system
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Confirm the installed Zoom versionRight-click Zoom.exe, select Properties, then view the File Version tab, or run 'Zoom --version' from command line if available, or check in Control Panel > Programs and FeaturesAffected if Any version of Zoom Client for Windows is installed (all versions are affected)
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Check if Zoom has network connectivity enabledOpen Zoom, go to Settings > Network, or check if Zoom is configured to connect to meetings/serversAffected if Zoom is configured to connect to the network (required for the vulnerability to be triggerable)
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Verify Zoom client is running or can accept connectionsCheck if Zoom process (Zoom.exe) is running via Task Manager, or verify the client has signed in with an accountAffected if Zoom client is active or has an authenticated user session (vulnerability requires authenticated user context)
If Zoom Client for Windows is installed with network connectivity and an active user session, the environment is affected by this vulnerability.
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 dataApply the vendor-supplied patch or update Zoom Client for Windows to the latest version. Network-level segmentation and access controls may limit exposure to unauthorized network actors.
- Consultation2.0 h
- Implementation1.0 h
- Testing1.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2025-46789 — 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-2025-46789 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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