Zoom Client Installer Local Privilege Escalation
Priority LOW 33CWE-732Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
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.
Why it matters now
EPSS 0.00195 9th percentileScored 2026-11-08
Fix Fixed Zoom Client for Meetings for MacOS (Standard and for IT Admin) (Zoom Video Communications Inc): 5.2.0Zoom Client Plugin for Sharing iPhone/iPad (Zoom Video Communications Inc): 5.2.0+1 more product
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Zoom Video Communications, Inc. | Zoom Client for Meetings for MacOS (Standard and for IT Admin) | before 5.2.0 | 5.2.0 | Patch available | CNA |
| Zoom Video Communications, Inc. | Zoom Client Plugin for Sharing iPhone/iPad | before 5.2.0 | 5.2.0 | Patch available | CNA |
| Zoom Video Communications, Inc. | Zoom Rooms for Conference | before 5.1.0 | 5.1.0 | Patch available | CNA |
- Zoom Client for Meetings for MacOS (Standard and for IT Admin) VendorZoom Video Communications, Inc. Affected before 5.2.0 Fixed in 5.2.0 Patch available CNA
- Zoom Client Plugin for Sharing iPhone/iPad VendorZoom Video Communications, Inc. Affected before 5.2.0 Fixed in 5.2.0 Patch available CNA
- Zoom Rooms for Conference VendorZoom Video Communications, Inc. Affected before 5.1.0 Fixed in 5.1.0 Patch available CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:zoom:meetings:*:*:*:*:*:macos:*:* | before 5.2.0 | Vulnerable | Zoom Video Communications, Inc. |
| cpe:2.3:a:zoom:rooms:*:*:*:*:*:*:*:* | before 5.1.0 | Vulnerable | Zoom Video Communications, Inc. |
| cpe:2.3:a:zoom:screen_sharing:*:*:*:*:*:ipados:*:* | before 5.2.0 | Vulnerable | Zoom Video Communications, Inc. |
| cpe:2.3:a:zoom:screen_sharing:*:*:*:*:*:iphone_os:*:* | before 5.2.0 | Vulnerable | Zoom Video Communications, Inc. |
- cpe:2.3:a:zoom:meetings:*:*:*:*:*:macos:*:* Versions before 5.2.0 Vulnerable ·Zoom Video Communications, Inc.
- cpe:2.3:a:zoom:rooms:*:*:*:*:*:*:*:* Versions before 5.1.0 Vulnerable ·Zoom Video Communications, Inc.
- cpe:2.3:a:zoom:screen_sharing:*:*:*:*:*:ipados:*:* Versions before 5.2.0 Vulnerable ·Zoom Video Communications, Inc.
- cpe:2.3:a:zoom:screen_sharing:*:*:*:*:*:iphone_os:*:* Versions before 5.2.0 Vulnerable ·Zoom Video Communications, Inc.
Remediation
- Fix · CNA Zoom Client for Meetings for MacOS (Standard and for IT Admin) (Zoom Video Communications Inc) Fixed in 5.2.0
- Fix · CNA Zoom Client Plugin for Sharing iPhone/iPad (Zoom Video Communications Inc) Fixed in 5.2.0
- Fix · CNA Zoom Rooms for Conference (Zoom Video Communications Inc) Fixed in 5.1.0
Timeline
- 2026-10-02 Threatist record created from CVE-2021-34409
- 2026-10-03 Alias added: GHSA-qc3j-qcr3-434w
References
More Zoom Video Communications, Inc. Meetings vulnerabilities
- TI-2021-13217 Improper certificate validation in Zoom Client for Meetings for Windows CVSS 3.1CRITICAL 9.8
- TI-2021-13457 Buffer overflow in Zoom client and other products CVSS 3.1CRITICAL 9.8
- TI-2022-11393 Improper URL parsing in Zoom Clients CVSS 3.1CRITICAL 9.6
- TI-2022-07034 Improperly constrained session cookies in Zoom Client for Meetings CVSS 3.1CRITICAL 9.1
- TI-2022-07035 Update package downgrade in Zoom Client for Meetings for Windows CVSS 3.1HIGH 8.8
- TI-2022-07033 Improper XML Parsing in Zoom Client for Meetings CVSS 3.1HIGH 8.1
Sources
- CVE-2021-34409 · CVE Program
- CVE-2021-34409 · NVD
- FIRST EPSS
- GHSA-qc3j-qcr3-434w · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences