{"id":"CVE-2026-70075","aliases":["EUVD-2026-99867","GHSA-v4w4-pr4r-w56x"],"status":"published","title":"Windows Virtualization-Based Security (VBS) Enclave Security Feature Bypass Vulnerability","description":"Time-of-check time-of-use (toctou) race condition in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to bypass a security feature locally.","severity":{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00308,"percentile":0.2389,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-367"],"published":"2026-10-13T19:00:41Z","modified":"2026-11-03T23:17:52Z","products":[{"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 23h2"},{"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 11 version 26h2"},{"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_1809"},{"vendor":"microsoft","product":"windows_10_21h2"},{"vendor":"microsoft","product":"windows_10_22h2"},{"vendor":"microsoft","product":"windows_11_23h2"},{"vendor":"microsoft","product":"windows_11_24h2"},{"vendor":"microsoft","product":"windows_11_25h2"},{"vendor":"microsoft","product":"windows_11_26h1"},{"vendor":"microsoft","product":"windows_11_26h2"},{"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-2026-70075","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-70075"},{"url":"https://github.com/advisories/GHSA-v4w4-pr4r-w56x"}],"sources":{"cve":[{"id":"CVE-2026-70075","title":"Windows Virtualization-Based Security (VBS) Enclave Security Feature Bypass Vulnerability","description":"Time-of-check time-of-use (toctou) race condition in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to bypass a security feature locally.","status":"published","published":"2026-10-13T19:00:41.363Z","modified":"2026-11-10T20:41:21.459Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna"}],"cwes":["CWE-367"],"updated_at":"2026-11-10T22:18:27.902968Z"}],"euvd":[{"id":"EUVD-2026-99867","description":"Time-of-check time-of-use (toctou) race condition in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to bypass a security feature locally.","status":"published","published":"2026-10-13T19:00:41Z","modified":"2026-11-10T20:41:21Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-10T22:23:58.135191Z"}],"ghsa":[{"id":"GHSA-v4w4-pr4r-w56x","title":"Time-of-check time-of-use (toctou) race condition in Windows Virtualization-Based Security (VBS)...","description":"Time-of-check time-of-use (toctou) race condition in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to bypass a security feature locally.","status":"published","published":"2026-10-13T21:34:03Z","modified":"2026-10-13T21:34:09Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"cwes":["CWE-367"],"updated_at":"2026-11-02T15:13:15.111505Z"}],"nvd":[{"id":"CVE-2026-70075","description":"Time-of-check time-of-use (toctou) race condition in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to bypass a security feature locally.","status":"published","published":"2026-10-13T19:19:19.05Z","modified":"2026-11-03T23:17:52.643Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-367"],"updated_at":"2026-11-04T01:48:36.614057Z"}]}}