{"id":"CVE-2021-34413","aliases":["EUVD-2021-21071","GHSA-mgjc-79v8-mc48"],"status":"published","title":"All versions of the Zoom Plugin for Microsoft Outlook for MacOS before 5.3.52553.0918 contain a...","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.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.00585,"percentile":0.48446,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-367"],"published":"2021-09-27T14:00:02Z","modified":"2026-06-17T03:55:48Z","products":[{"vendor":"zoom","product":"zoom_plugin_for_microsoft_outlook"}],"references":[{"url":"https://explore.zoom.us/en/trust/security/security-bulletin/","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-34413"},{"url":"https://cwe.mitre.org/data/definitions/367.html"},{"url":"https://github.com/advisories/GHSA-mgjc-79v8-mc48"}],"sources":{"cve":[{"id":"CVE-2021-34413","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.","status":"published","published":"2021-09-27T14:00:02Z","modified":"2024-08-04T00:12:50.089Z","updated_at":"2026-11-02T14:33:11.244759Z"}],"euvd":[{"id":"EUVD-2021-21071","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.","status":"published","published":"2021-09-27T14:00:02Z","modified":"2024-08-04T00:12:50Z","updated_at":"2026-11-03T03:24:32.445199Z"}],"ghsa":[{"id":"GHSA-mgjc-79v8-mc48","title":"All versions of the Zoom Plugin for Microsoft Outlook for MacOS before 5.3.52553.0918 contain a...","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.","status":"published","published":"2022-05-24T19:15:50Z","modified":"2023-01-30T05:02:20Z","cwes":["CWE-367"],"updated_at":"2026-11-02T14:46:37.149934Z"}],"nvd":[{"id":"CVE-2021-34413","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.","status":"published","published":"2021-09-27T14:15:08.31Z","modified":"2026-06-17T03:55:48.61Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6,"vector":"AV:N/AC:M/Au:S/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-367"],"updated_at":"2026-11-02T14:06:58.933037Z"}]}}