CVE-2021-34409
Zoom Client Installer Local Privilege Escalation
- Published
- Updated
- Reserved
- Assigned by
- Zoom
Description
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| ZoomCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.19% · top 91% of all CVEs (7 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
- Creation of Temporary File in Directory with Insecure Permissions
- CWE-732 (opens in a new tab)All about CWE-732 and its CVEs
Affected products
Zoom Video Communications Inc · Zoom Client for Meetings for MacOS (Standard and for IT Admin)
- affected unspecified – < 5.2.0
Zoom Video Communications Inc · Zoom Client Plugin for Sharing iPhone/iPad
- affected unspecified – < 5.2.0
Zoom Video Communications Inc · Zoom Rooms for Conference
- affected unspecified – < 5.1.0
References (1)
- https://explore.zoom.us/en/trust/security/security-bulletin (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-34409)Record last updated .