{"id":"CVE-2026-77540","aliases":["EUVD-2026-66367","GHSA-w5vh-8c24-45f5"],"status":"published","title":"A malicious actor with access to the network and high privileges could exploit an Improper Input...","description":"A malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UniFi OS Server to execute a Command Injection on the host device.","severity":{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.01294,"percentile":0.7055,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20"],"published":"2026-08-26T09:53:45Z","modified":"2026-08-28T18:49:15Z","products":[{"vendor":"ubiquiti inc","product":"unifi os server"}],"references":[{"url":"https://community.ui.com/releases/Security-Advisory-Bulletin-067/fc4a3488-7c43-4628-8bab-f715e96dbfc9"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-77540"},{"url":"https://github.com/advisories/GHSA-w5vh-8c24-45f5"}],"sources":{"cve":[{"id":"CVE-2026-77540","description":"A malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UniFi OS Server to execute a Command Injection on the host device.","status":"published","published":"2026-08-26T09:53:45.472Z","modified":"2026-08-27T03:56:53.322Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:20:15.712761Z"}],"euvd":[{"id":"EUVD-2026-66367","description":"A malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UniFi OS Server to execute a Command Injection on the host device.","status":"published","published":"2026-08-26T09:53:45Z","modified":"2026-08-27T03:56:53Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T18:01:28.934147Z"}],"ghsa":[{"id":"GHSA-w5vh-8c24-45f5","title":"A malicious actor with access to the network and high privileges could exploit an Improper Input...","description":"A malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UniFi OS Server to execute a Command Injection on the host device.","status":"published","published":"2026-08-27T06:31:29Z","modified":"2026-08-27T06:31:30Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T15:11:02.000078Z"}],"nvd":[{"id":"CVE-2026-77540","description":"A malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UniFi OS Server to execute a Command Injection on the host device.","status":"published","published":"2026-08-26T10:16:41.92Z","modified":"2026-08-28T18:49:15.34Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:12:41.66469Z"}]}}