CVE-2021-34413

HIGH
7.5
CVSS Score
Published: September 27, 2021 at 02:00 PM UTC
Updated: June 17, 2026 at 03:55 AM UTC
1 product affected across 1 vendorZoom Plugin for Microsoft Outlook

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Severity
HIGH7.5
Exploit prediction
EPSS 0.6%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 5.3.52553.0918
Affected range stops below 5.3.52553.0918, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (1)

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

CVSS

Attack Vector
NETWORK
Complexity
HIGH
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-367

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