CVE-2021-33907: Zoom Meetings

Critical severity, CVSS 9.8. EPSS: 3% chance of exploitation in the next 30 days.

The Zoom Client for Meetings for Windows in all versions before 5.3.0 fails to properly validate the certificate information used to sign .msi files when performing an update of the client. This could lead to remote code execution in an elevated privileged context.

Affected products

• Zoom Meetings: before 5.3.0 (fixed in 5.3.0)

Published 2021-09-27. Last modified 2026-06-17.