CVE-2025-30668Network attack vector

Authenticated service interruption via integer underflow

Published May 14, 2025 · Updated Oct 2, 2025

Integer underflow in Zoom Workplace Apps allows remote authenticated users to interrupt service through network access. Zoom has not disclosed the affected component, the underflowing calculation, or how its wrapped result causes denial of service. Exploitation requires an authenticated account and network access; published impact is limited to availability, with no reported data access or modification.

CVSS severity6.5
Medium
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer underflow in Zoom Workplace Apps allows remote authenticated users to interrupt service through network access. Zoom has not disclosed the affected component, the underflowing calculation, or how its wrapped result causes denial of service. Exploitation requires an authenticated account and network access; published impact is limited to availability, with no reported data access or modification.

The record

CVE
CVE-2025-30668
Published
May 14, 2025
Updated
Oct 2, 2025
Vendor
Zoom Video Communications, Inc.
Product
Zoom Workplace Apps
Classifications
CWE-191, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 2, 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=see references

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Zoom Video Communications, Inc. · Zoom Workplace Appsversion=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-191Integer Underflow (Wrap or Wraparound)
T1499Endpoint Denial of Service

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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