CVE-2025-49458Network attack vector

Authenticated client denial of service via buffer overflow

Published Sep 9, 2025 · Updated Sep 10, 2025

Buffer overflow in Zoom Workplace before 6.5.0 allows remote authenticated users to interrupt the client through network access. Zoom has not published the affected component or the network input and buffer-copy operation that lacks a size check. Exploitation requires authenticated access and causes client denial of service, with no reported confidentiality or integrity impact.

CVSS severity6.5
Medium
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in Zoom Workplace before 6.5.0 allows remote authenticated users to interrupt the client through network access. Zoom has not published the affected component or the network input and buffer-copy operation that lacks a size check. Exploitation requires authenticated access and causes client denial of service, with no reported confidentiality or integrity impact.

The record

CVE
CVE-2025-49458
Published
Sep 9, 2025
Updated
Sep 10, 2025
Vendor
Zoom Video Communications, Inc.
Product
Zoom Workplace
Classifications
CWE-120, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 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?

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  1. Affected versionversion=see references

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Zoom Video Communications, Inc. · Zoom Workplaceversion=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.

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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')
T1499.004Endpoint Denial of Service: Application 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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