CVE-2025-46789Network attack vector

Authenticated client crash via unchecked buffer copy

Published Jul 10, 2025 · Updated Jul 10, 2025

Classic buffer overflow in Zoom Clients for Windows allows remote authenticated users to crash affected clients via network access. The mapped weakness copies an input buffer without verifying that it fits the destination, but Zoom has not disclosed the affected component. Exploitation requires authorized access and network reachability; the documented consequence is limited to client denial of service.

CVSS severity6.5
Medium
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Classic buffer overflow in Zoom Clients for Windows allows remote authenticated users to crash affected clients via network access. The mapped weakness copies an input buffer without verifying that it fits the destination, but Zoom has not disclosed the affected component. Exploitation requires authorized access and network reachability; the documented consequence is limited to client denial of service.

The record

CVE
CVE-2025-46789
Published
Jul 10, 2025
Updated
Jul 10, 2025
Vendor
Zoom Video Communications, Inc.
Product
Zoom Clients for Windows
Classifications
CWE-120, CAPEC-100, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 10, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 10, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <see references

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Zoom Video Communications, Inc. · Zoom Clients for Windowsversion=0 <see references

Published CVSS scores

6.5Zoom CommunicationsCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CAPEC-100Overflow Buffers
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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