CVE-2026-53410

Local privilege escalation via installer TOCTOU race

Published Jul 16, 2026 · Updated Jul 16, 2026

A TOCTOU race in Zoom Clients for Windows allows local users to escalate privileges during installation or uninstallation. Zoom has not disclosed the checked resource, the privileged operation performed after the check, or the race window. Exploitation requires authenticated local access and winning a high-complexity race; success grants elevated Windows privileges.

CVSS severity7.0
High
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A TOCTOU race in Zoom Clients for Windows allows local users to escalate privileges during installation or uninstallation. Zoom has not disclosed the checked resource, the privileged operation performed after the check, or the race window. Exploitation requires authenticated local access and winning a high-complexity race; success grants elevated Windows privileges.

The record

CVE
CVE-2026-53410
Published
Jul 16, 2026
Updated
Jul 16, 2026
Vendor
Zoom Video Communications, Inc.
Product
Zoom Clients
Classifications
CWE-367, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 16, 2026Record 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 vectorlocal
Required privilegesauthenticated

What is affected?

Zoom Video Communications, Inc. · Zoom Clientsversion=see references

Published CVSS scores

7.0Zoom CommunicationsCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
T1068Exploitation for Privilege Escalation

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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