CVE-2021-34409

highpriority · track · 31EPSS 0.002 · 9 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.19% (9th) EPSS

CVSS 7.2 · high

Is it mine?

6 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

It was discovered that the installation packages of the Zoom Client for Meetings for MacOS (Standard and for IT Admin) installation before version 5.2.0, Zoom Client Plugin for Sharing iPhone/iPad before version 5.2.0, and Zoom Rooms for Conference before version 5.1.0, copy pre- and post- installation shell scripts to a user-writable directory. In the affected products listed below, a malicious actor with local access to a user's machine could use this flaw to potentially run arbitrary system commands in a higher privileged context during the installation process.

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.07.2highAV:L/AC:L/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 3.9 · impact 10

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.9

v3.17.8highCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:Hsecondary · ENISA EU

v3.17.8highCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:Hsecondary · security@zoom.usexploitability 1.1 · impact 6

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-732USprimary

affected products (6)

Products and version ranges known to be affected.

Zoom Video Communications Inc Zoom Client Plugin for Sharing iPhone/iPadunspecified → 5.2.0enisa_euvdEU
Zoom Video Communications Inc Zoom Client for Meetings for MacOS (Standard and for IT Admin)unspecified → 5.2.0enisa_euvdEU
Zoom Video Communications Inc Zoom Rooms for Conferenceunspecified → 5.1.0enisa_euvdEU
zoom meetings< 5.2.0nvdUScpe:2.3:a:zoom:meetings:*:*:*:*:*:*:*:*
zoom rooms< 5.1.0nvdUScpe:2.3:a:zoom:rooms:*:*:*:*:*:*:*:*
zoom screen sharing< 5.2.0nvdUScpe:2.3:a:zoom:screen_sharing:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2021-09-27modified 2026-06-17

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references (4)

External citations — patches, advisories, analysis.

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