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Vulnerability record · CVE-2023-49646 · published 13 December 2023

CVE-2023-49646: Zoom meeting software development kit improper verification of cryptographic signature vulnerability

Zoom · Meeting Software Development Kit

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.

6.5 CVSS 3.1 Medium EPSS 0.40% · top 68.1% CWE-347 · Improper verification of cryptographic signatureCWE-287 · Improper authentication
6.5CVSS 3.1 base score
0.40%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.zoom.com/en/trust/security-bulletin/ZSB-23062/ Vendor Advisory
https://www.zoom.com/en/trust/security-bulletin/ZSB-23062/ Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2023-49646), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.