CVE-2021-34412

Severity: high (CVSS 7.8 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: 2021-09-27 · updated 2026-06-17
Weakness: CWE-269

Description

During the installation process for all versions of the Zoom Client for Meetings for Windows before 5.4.0, it is possible to launch Internet Explorer. If the installer was launched with elevated privileges such as by SCCM this can result in a local privilege escalation.

Affected products

Zoom Workplace: before 5.4.0 — fixed in 5.4.0

How to fix

Upgrade to a fixed version: Zoom Workplace 5.4.0. Check the vendor advisory for mitigations.

References

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

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