CVE-2021-33907

9.8 criticalEPSS 4.0%

Critical (9.8) in zoom meetings. EPSS 4.0% 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.

Severity

CVSS 3.1

9.8 critical

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

EPSS: 4.0% chance of exploitation in the next 30 days; higher than 90% of CVEs (scores of 2026-10-31)
CWE: CWE-295
Published: 2021-09-27
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

zoom:meetings

References

https://explore.zoom.us/en/trust/security/security-bulletin/
https://explore.zoom.us/en/trust/security/security-bulletin/

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