{"id":"CVE-2021-34409","aliases":["EUVD-2021-21067","GHSA-qc3j-qcr3-434w"],"status":"published","title":"Zoom Client Installer Local Privilege Escalation","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.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00195,"percentile":0.09199,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-269","CWE-732"],"published":"2021-09-27T13:55:40Z","modified":"2026-06-17T03:55:48Z","products":[{"vendor":"zoom","product":"meetings"},{"vendor":"zoom","product":"rooms"},{"vendor":"zoom","product":"screen_sharing"},{"vendor":"zoom video communications inc","product":"zoom client for meetings for macos (standard and for it admin)"},{"vendor":"zoom video communications inc","product":"zoom client plugin for sharing iphone/ipad"},{"vendor":"zoom video communications inc","product":"zoom rooms for conference"}],"references":[{"url":"https://explore.zoom.us/en/trust/security/security-bulletin","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-34409"},{"url":"https://cwe.mitre.org/data/definitions/379.html"},{"url":"https://explore.zoom.us/en/trust/security/security-bulletin/"},{"url":"https://github.com/advisories/GHSA-qc3j-qcr3-434w"}],"sources":{"cve":[{"id":"CVE-2021-34409","title":"Zoom Client Installer Local Privilege Escalation","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.","status":"published","published":"2021-09-27T13:55:40.225Z","modified":"2024-09-16T23:46:09.631Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"cna"}],"updated_at":"2026-11-02T14:33:11.244759Z"}],"euvd":[{"id":"EUVD-2021-21067","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.","status":"published","published":"2021-09-27T13:55:40Z","modified":"2024-09-16T23:46:09Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-03T00:54:46.734285Z"}],"ghsa":[{"id":"GHSA-qc3j-qcr3-434w","title":"User-writable pre and post-install scripts unpacked during the Zoom Client for Meetings for MacOS...","description":"User-writable pre and post-install scripts unpacked during the Zoom Client for Meetings for MacOS installation before version 5.2.0 allow for privilege escalation to root.","status":"published","published":"2022-05-24T19:15:51Z","modified":"2023-01-27T05:08:08Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T14:43:15.040364Z"}],"nvd":[{"id":"CVE-2021-34409","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.","status":"published","published":"2021-09-27T14:15:08.137Z","modified":"2026-06-17T03:55:48.187Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":7.2,"vector":"AV:L/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-732"],"updated_at":"2026-11-02T14:06:58.933037Z"}]}}