CVE-2021-34413

7.5 highEPSS 0.6%

High (7.5) in zoom zoom plugin for microsoft outlook. EPSS 0.6% chance of exploitation in the next 30 days.

All versions of the Zoom Plugin for Microsoft Outlook for MacOS before 5.3.52553.0918 contain a Time-of-check Time-of-use (TOC/TOU) vulnerability during the plugin installation process. This could allow a standard user to write their own malicious application to the plugin directory, allowing the malicious application to execute in a privileged context.

Severity

CVSS 3.1

7.5 high

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

EPSS: 0.6% chance of exploitation in the next 30 days; higher than 47% of CVEs (scores of 2026-10-31)
CWE: CWE-367
Published: 2021-09-27
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

zoom:zoom_plugin_for_microsoft_outlook

References

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

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