{"id":"CVE-2021-34415","aliases":["EUVD-2021-21073","GHSA-736v-pj2q-r8qr"],"status":"published","title":"The Zone Controller service in the Zoom On-Premise Meeting Connector Controller before version 4...","description":"The Zone Controller service in the Zoom On-Premise Meeting Connector Controller before version 4.6.358.20210205 does not verify the cnt field sent in incoming network packets, which leads to exhaustion of resources and system crash.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.00978,"percentile":0.62656,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20","CWE-770"],"published":"2021-09-27T13:56:06Z","modified":"2026-06-17T03:55:48Z","products":[{"vendor":"zoom","product":"meeting_connector"},{"vendor":"zoom video communications inc","product":"zoom on-premise meeting connector controller"}],"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-2021-34415"},{"url":"https://cwe.mitre.org/data/definitions/400.html"},{"url":"https://github.com/advisories/GHSA-736v-pj2q-r8qr"}],"sources":{"cve":[{"id":"CVE-2021-34415","description":"The Zone Controller service in the Zoom On-Premise Meeting Connector Controller before version 4.6.358.20210205 does not verify the cnt field sent in incoming network packets, which leads to exhaustion of resources and system crash.","status":"published","published":"2021-09-27T13:56:06Z","modified":"2024-08-04T00:12:49.983Z","updated_at":"2026-11-02T14:33:11.244759Z"}],"euvd":[{"id":"EUVD-2021-21073","description":"The Zone Controller service in the Zoom On-Premise Meeting Connector Controller before version 4.6.358.20210205 does not verify the cnt field sent in incoming network packets, which leads to exhaustion of resources and system crash.","status":"published","published":"2021-09-27T13:56:06Z","modified":"2024-08-04T00:12:49Z","updated_at":"2026-11-03T03:24:32.445199Z"}],"ghsa":[{"id":"GHSA-736v-pj2q-r8qr","title":"The Zone Controller service in the Zoom On-Premise Meeting Connector Controller before version 4...","description":"The Zone Controller service in the Zoom On-Premise Meeting Connector Controller before version 4.6.358.20210205 does not verify the cnt field sent in incoming network packets, which leads to exhaustion of resources and system crash.","status":"published","published":"2022-05-24T19:15:50Z","modified":"2023-01-27T05:03:33Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:42:16.196802Z"}],"nvd":[{"id":"CVE-2021-34415","description":"The Zone Controller service in the Zoom On-Premise Meeting Connector Controller before version 4.6.358.20210205 does not verify the cnt field sent in incoming network packets, which leads to exhaustion of resources and system crash.","status":"published","published":"2021-09-27T14:15:08.397Z","modified":"2026-06-17T03:55:48.813Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":7.8,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:06:58.933037Z"}]}}