CVE-2021-34420: Zoom Client For Meetings

High severity, CVSS 7.4. EPSS: 0.4% chance of exploitation in the next 30 days.

The Zoom Client for Meetings for Windows installer before version 5.5.4 does not properly verify the signature of files with .msi, .ps1, and .bat extensions. This could lead to a malicious actor installing malicious software on a customer’s computer.

Affected products

• Zoom Zoom Client For Meetings: before 5.4.4 (fixed in 5.4.4)

Published 2021-11-11. Last modified 2026-06-17.