{"id":"CVE-2021-44527","aliases":["EUVD-2021-31359","GHSA-2fpq-jhjc-vqfv"],"status":"published","title":"A vulnerability found in UniFi Switch firmware Version 5.43.35 and earlier allows a malicious...","description":"A vulnerability found in UniFi Switch firmware Version 5.43.35 and earlier allows a malicious actor who has already gained access to the network to perform a Deny of Service (DoS) attack on the affected switch.This vulnerability is fixed in UniFi Switch firmware 5.76.6 and later.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00381,"percentile":0.32364,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-400"],"published":"2021-12-07T13:12:26Z","modified":"2026-06-17T04:12:31Z","products":[{"vendor":"ubiquiti inc","product":"unifi switches"},{"vendor":"ui","product":"unifi_switch_firmware"}],"references":[{"url":"https://community.ui.com/releases/Security-Advisory-Bulletin-022-022/cd83c01b-33e4-454a-b3b9-1c3ccebea7cb","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-44527"},{"url":"https://github.com/advisories/GHSA-2fpq-jhjc-vqfv"}],"sources":{"cve":[{"id":"CVE-2021-44527","description":"A vulnerability found in UniFi Switch firmware Version 5.43.35 and earlier allows a malicious actor who has already gained access to the network to perform a Deny of Service (DoS) attack on the affected switch.This vulnerability is fixed in UniFi Switch firmware 5.76.6 and later.","status":"published","published":"2021-12-07T13:12:26Z","modified":"2024-08-04T04:25:16.471Z","cwes":["CWE-400"],"updated_at":"2026-11-02T14:33:01.166399Z"}],"euvd":[{"id":"EUVD-2021-31359","description":"A vulnerability found in UniFi Switch firmware Version 5.43.35 and earlier allows a malicious actor who has already gained access to the network to perform a Deny of Service (DoS) attack on the affected switch.This vulnerability is fixed in UniFi Switch firmware 5.76.6 and later.","status":"published","published":"2021-12-07T13:12:26Z","modified":"2024-08-04T04:25:16Z","updated_at":"2026-11-03T03:08:29.150764Z"}],"ghsa":[{"id":"GHSA-2fpq-jhjc-vqfv","title":"A vulnerability found in UniFi Switch firmware Version 5.43.35 and earlier allows a malicious...","description":"A vulnerability found in UniFi Switch firmware Version 5.43.35 and earlier allows a malicious actor who has already gained access to the network to perform a Deny of Service (DoS) attack on the affected switch.This vulnerability is fixed in UniFi Switch firmware 5.76.6 and later.","status":"published","published":"2021-12-08T00:01:28Z","modified":"2023-02-01T05:06:57Z","cwes":["CWE-400"],"updated_at":"2026-11-02T14:50:27.414775Z"}],"nvd":[{"id":"CVE-2021-44527","description":"A vulnerability found in UniFi Switch firmware Version 5.43.35 and earlier allows a malicious actor who has already gained access to the network to perform a Deny of Service (DoS) attack on the affected switch.This vulnerability is fixed in UniFi Switch firmware 5.76.6 and later.","status":"published","published":"2021-12-07T14:15:09.847Z","modified":"2026-06-17T04:12:31.207Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":6.1,"vector":"AV:A/AC:L/Au:N/C:N/I:N/A:C","level":"medium","assessor":"primary"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:07:01.811115Z"}]}}