{"id":"CVE-2026-49783","aliases":["EUVD-2026-43801","GHSA-vm4m-9p6f-gcg7"],"status":"published","title":"Secure Boot Security Feature Bypass Vulnerability","description":"Improperly implemented security check for standard in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.","severity":{"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/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00333,"percentile":0.26826,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-358"],"published":"2026-07-14T17:05:50Z","modified":"2026-11-10T22:36:28Z","products":[{"vendor":"microsoft","product":"windows 10 version 1607"},{"vendor":"microsoft","product":"windows 10 version 1809"},{"vendor":"microsoft","product":"windows 10 version 21h2"},{"vendor":"microsoft","product":"windows 10 version 22h2"},{"vendor":"microsoft","product":"windows 11 version 24h2"},{"vendor":"microsoft","product":"windows 11 version 25h2"},{"vendor":"microsoft","product":"windows 11 version 26h1"},{"vendor":"microsoft","product":"windows server 2016"},{"vendor":"microsoft","product":"windows server 2016 (server core installation)"},{"vendor":"microsoft","product":"windows server 2019"},{"vendor":"microsoft","product":"windows server 2019 (server core installation)"},{"vendor":"microsoft","product":"windows server 2022"},{"vendor":"microsoft","product":"windows server 2025"},{"vendor":"microsoft","product":"windows server 2025 (server core installation)"},{"vendor":"microsoft","product":"windows_10_1607"},{"vendor":"microsoft","product":"windows_10_1809"},{"vendor":"microsoft","product":"windows_10_21h2"},{"vendor":"microsoft","product":"windows_10_22h2"},{"vendor":"microsoft","product":"windows_11_24h2"},{"vendor":"microsoft","product":"windows_11_25h2"},{"vendor":"microsoft","product":"windows_11_26h1"},{"vendor":"microsoft","product":"windows_server_2016"},{"vendor":"microsoft","product":"windows_server_2019"},{"vendor":"microsoft","product":"windows_server_2022"},{"vendor":"microsoft","product":"windows_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49783","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-49783"},{"url":"https://github.com/advisories/GHSA-vm4m-9p6f-gcg7"}],"sources":{"cve":[{"id":"CVE-2026-49783","title":"Secure Boot Security Feature Bypass Vulnerability","description":"Improperly implemented security check for standard in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.","status":"published","published":"2026-07-14T17:05:50.741Z","modified":"2026-11-10T22:36:28.428Z","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/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-358"],"updated_at":"2026-11-10T23:49:29.024872Z"}],"euvd":[{"id":"EUVD-2026-43801","description":"Improperly implemented security check for standard in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.","status":"published","published":"2026-07-14T17:05:50Z","modified":"2026-11-10T22:36:28Z","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/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-11T00:24:48.910061Z"}],"ghsa":[{"id":"GHSA-vm4m-9p6f-gcg7","title":"Improperly implemented security check for standard in Windows Secure Boot allows an authorized...","description":"Improperly implemented security check for standard in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.","status":"published","published":"2026-07-14T18:32:01Z","modified":"2026-07-14T18:32:06Z","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-358"],"updated_at":"2026-11-02T15:09:28.277582Z"}],"nvd":[{"id":"CVE-2026-49783","description":"Improperly implemented security check for standard in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.","status":"published","published":"2026-07-14T17:16:53.747Z","modified":"2026-07-22T16:17:30.07Z","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","assessor":"secondary"}],"cwes":["CWE-358"],"updated_at":"2026-11-02T14:12:29.114188Z"}]}}