CVE-2023-49646

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-12-13 · updated 2026-06-17
Weakness: CWE-347

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.

Affected products

Zoom Meeting Software Development Kit: before 5.16.5 — fixed in 5.16.5
Zoom Video Software Development Kit: before 5.16.5 — fixed in 5.16.5
Zoom Virtual Desktop Infrastructure: before 5.14.14; from 5.15.0 before 5.15.12 — fixed in 5.14.14, 5.15.12
Zoom Video Communications, Inc. Zoom Desktop Client for Windows: before 5.16.5 — fixed in 5.16.5

How to fix

Upgrade to a fixed version: Zoom Meeting Software Development Kit 5.16.5; Zoom Video Software Development Kit 5.16.5; Zoom Virtual Desktop Infrastructure 5.14.14, 5.15.12; Zoom Video Communications, Inc. Zoom Desktop Client for Windows 5.16.5. Check the vendor advisory for mitigations.

References

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