{"id":"CVE-2026-49783","aliases":[],"cve":{"records":[{"id":"CVE-2026-49783","source":"microsoft","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-06-01T17:02:37.207Z","published":"2026-07-14T17:05:50.741Z","modified":"2026-11-10T22:36:28.428Z"}],"publishers":[{"name":"microsoft","role":"CNA","organizationId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","modified":"2026-11-10T22:36:28.428Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-07-16T03:55:30.377Z"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49783","tags":["vendor-advisory","patch"],"source":"microsoft"}],"weaknesses":[{"id":"CWE-358","description":"CWE-358: Improperly Implemented Security Check for Standard","source":"microsoft"}],"applicability":[{"source":"microsoft","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*","versionStartIncluding":"10.0.17763.0","versionEndExcluding":"10.0.17763.9020"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*","versionStartIncluding":"10.0.17763.0","versionEndExcluding":"10.0.17763.9020"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*","versionStartIncluding":"10.0.17763.0","versionEndExcluding":"10.0.17763.9020"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*","versionStartIncluding":"10.0.20348.0","versionEndExcluding":"10.0.20348.5386"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*","versionStartIncluding":"10.0.19044.0","versionEndExcluding":"10.0.19044.7548"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*","versionStartIncluding":"10.0.19045.0","versionEndExcluding":"10.0.19045.7548"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*","versionStartIncluding":"10.0.26100.0","versionEndExcluding":"10.0.26100.33158"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*","versionStartIncluding":"10.0.26200.0","versionEndExcluding":"10.0.26200.8875"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*","versionStartIncluding":"10.0.26100.0","versionEndExcluding":"10.0.26100.8875"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*","versionStartIncluding":"10.0.26100.0","versionEndExcluding":"10.0.26100.33158"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_11_26H1:*:*:*:*:*:*:x64:*","versionStartIncluding":"10.0.28000.0","versionEndExcluding":"10.0.28000.2525"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*","versionStartIncluding":"10.0.14393.0","versionEndExcluding":"10.0.14393.9339"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*","versionStartIncluding":"10.0.14393.0","versionEndExcluding":"10.0.14393.9339"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*","versionStartIncluding":"10.0.14393.0","versionEndExcluding":"10.0.14393.9339"}]}]}]}],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-07-15T00:00:00+00:00","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"total"}]}]},"title":"Secure Boot Security Feature Bypass Vulnerability","titleSource":"microsoft","descriptionSource":"microsoft","description":"Improperly implemented security check for standard in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.","score":7.8,"severity":"high","published":"2026-07-14T17:05:50.741Z","modified":"2026-11-10T22:36:28.428Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Microsoft","name":"Windows 10 Version 1607","platforms":["32-bit Systems","x64-based Systems"],"versions":[{"version":"10.0.14393.0","status":"affected","lessThan":"10.0.14393.9339","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-49783"},{"vendor":"Microsoft","name":"Windows 10 Version 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Systems"],"versions":[{"version":"10.0.14393.0","status":"affected","lessThan":"10.0.14393.9339","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-49783"},{"vendor":"Microsoft","name":"Windows Server 2016 (Server Core installation)","platforms":["x64-based Systems"],"versions":[{"version":"10.0.14393.0","status":"affected","lessThan":"10.0.14393.9339","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-49783"},{"vendor":"Microsoft","name":"Windows Server 2019","platforms":["x64-based Systems"],"versions":[{"version":"10.0.17763.0","status":"affected","lessThan":"10.0.17763.9020","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-49783"},{"vendor":"Microsoft","name":"Windows Server 2019 (Server Core installation)","platforms":["x64-based Systems"],"versions":[{"version":"10.0.17763.0","status":"affected","lessThan":"10.0.17763.9020","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-49783"},{"vendor":"Microsoft","name":"Windows Server 2022","platforms":["x64-based Systems"],"versions":[{"version":"10.0.20348.0","status":"affected","lessThan":"10.0.20348.5386","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-49783"},{"vendor":"Microsoft","name":"Windows Server 2025","platforms":["x64-based Systems"],"versions":[{"version":"10.0.26100.0","status":"affected","lessThan":"10.0.26100.33158","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-49783"},{"vendor":"Microsoft","name":"Windows Server 2025 (Server Core installation)","platforms":["x64-based Systems"],"versions":[{"version":"10.0.26100.0","status":"affected","lessThan":"10.0.26100.33158","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-49783"}],"remediation":[],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49783"],"sources":[{"name":"CVE","id":"CVE-2026-49783","modified":"2026-11-10T22:36:28.428Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-49783"}],"assessments":[{"source":"microsoft","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","score":7.8}],"sourceAffected":[],"observedAt":"2026-11-10T23:14:13.476Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T03:00:33.317Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-11-02T06:05:35.019Z","attemptedAt":"2026-11-02T06:05:35.019Z"},{"source":"GHSA","status":"available","checkedAt":"2026-11-02T06:05:34.250Z","attemptedAt":"2026-11-02T06:05:34.250Z"},{"source":"EUVD","status":"available","checkedAt":"2026-11-02T06:05:34.243Z","attemptedAt":"2026-11-02T06:05:34.243Z"},{"source":"EPSS","status":"available","checkedAt":"2026-11-02T06:05:34.711Z","attemptedAt":"2026-11-02T06:05:34.711Z"}],"evidence":[{"source":"ENISA EUVD","id":"EUVD-2026-43801","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-43801","modified":"Nov 1, 2026, 5:33:30 PM","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","checkedAt":"2026-11-02T06:05:34.243Z"},{"source":"GitHub Advisory Database","id":"GHSA-vm4m-9p6f-gcg7","url":"https://github.com/advisories/GHSA-vm4m-9p6f-gcg7","modified":"2026-07-14T18:32:06Z","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","checkedAt":"2026-11-02T06:05:34.250Z"},{"source":"FIRST EPSS","id":"CVE-2026-49783","url":"https://www.first.org/epss/","probability":0.00333,"percentile":0.26662,"date":"2026-11-01","checkedAt":"2026-11-02T06:05:34.711Z"},{"source":"NVD","id":"CVE-2026-49783","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-49783","modified":"2026-07-22T16:17:30.070","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","checkedAt":"2026-11-02T06:05:35.019Z"}],"aiSummary":{"text":"A security feature bypass vulnerability in Windows Secure Boot allows an authorized attacker to bypass a security feature locally, affecting Windows 10 versions 1607, 1809, 21H2, and 22H2, and Windows 11 versions 24H2, 25H2, and 26H1, as well as Windows Server 2016, 2019, 2022, and 2025. The vulnerability is due to an improperly implemented security check. An attacker with local access can exploit this vulnerability.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-30T09:08:25.816Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-49783"}]}}