CVE-2023-22883

SYSTEM privilege escalation via installer TOCTOU race

Published Mar 16, 2023 · Updated Feb 26, 2025

TOCTOU race in Zoom Client for Meetings IT Admin Windows installers before 5.13.5 allows local users to gain SYSTEM privileges. The installer checks and later uses an installation resource without ensuring it remains unchanged; Zoom has not identified that resource or published further implementation detail. Exploitation requires low-privileged local access, user interaction, and a concurrent installation, and grants full SYSTEM control.

CVSS severity7.2
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

TOCTOU race in Zoom Client for Meetings IT Admin Windows installers before 5.13.5 allows local users to gain SYSTEM privileges. The installer checks and later uses an installation resource without ensuring it remains unchanged; Zoom has not identified that resource or published further implementation detail. Exploitation requires low-privileged local access, user interaction, and a concurrent installation, and grants full SYSTEM control.

The record

CVE
CVE-2023-22883
Published
Mar 16, 2023
Updated
Feb 26, 2025
Vendor
Zoom Video Communications, Inc.
Product
Zoom Client for Meetings for Windows
Classifications
CWE-367, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 16, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 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=unspecified <5.13.5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Zoom Video Communications, Inc. · Zoom Client for Meetings for Windowsversion=unspecified <5.13.5

Published CVSS scores

7.2Zoom Video Communications, Inc.CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:N/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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