---
id: CVE-2023-49646
title: >-
  Improper authentication in some Zoom clients before version 5.16.5 may allow
  an authenticated user to conduct a denial of service via network access.
summary: >-
  Improper authentication in some Zoom clients before version 5.16.5 may allow
  an authenticated user to conduct a denial of service via network access.
severity: medium
cvss: 6.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L'
cvssSource: cna
cwe:
  - CWE-347
vendor: 'Zoom Video Communications, Inc.'
product: Zoom Clients
affected:
  - zoom_clients See references
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-02T22:41:14.131531Z'
published: '2023-12-13'
updated: '2026-11-02'
sourceUpdated: '2026-11-02T22:41:19.198Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2023-49646'
references:
  - url: 'https://www.zoom.com/en/trust/security-bulletin/ZSB-23062/'
tags:
  - cve.org
epss: 0.00403
epssPercentile: 0.34713
ingestedAt: '2026-11-05T19:30:42.882Z'
---

## Overview

Improper authentication in some Zoom clients before version 5.16.5 may allow an authenticated user to conduct a denial of service via network access.

## Affected

- `zoom_clients See references`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.