{"id":"CVE-2026-100219","aliases":["EUVD-2026-100332","GHSA-p7cc-rr8j-52c3"],"status":"published","title":"Microsoft QUIC Remote Code Execution Vulnerability","description":"Use after free in Microsoft QUIC allows an unauthorized attacker to execute code over a network.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.01105,"percentile":0.66218,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-416"],"published":"2026-10-13T19:01:31Z","modified":"2026-11-03T22:13:17Z","products":[{"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 2022"},{"vendor":"microsoft","product":"windows server 2025"},{"vendor":"microsoft","product":"windows server 2025 (server core installation)"},{"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_2022"},{"vendor":"microsoft","product":"windows_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-100219","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100219"},{"url":"https://github.com/advisories/GHSA-p7cc-rr8j-52c3"}],"sources":{"cve":[{"id":"CVE-2026-100219","title":"Microsoft QUIC Remote Code Execution Vulnerability","description":"Use after free in Microsoft QUIC allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-10-13T19:01:31.456Z","modified":"2026-11-10T20:45:58.962Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"critical","assessor":"cna"}],"cwes":["CWE-416"],"updated_at":"2026-11-10T22:18:24.949973Z"}],"euvd":[{"id":"EUVD-2026-100332","description":"Use after free in Microsoft QUIC allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-10-13T19:01:31Z","modified":"2026-11-10T20:45:58Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"critical"}],"updated_at":"2026-11-10T22:23:55.776344Z"}],"ghsa":[{"id":"GHSA-p7cc-rr8j-52c3","title":"Use after free in Microsoft QUIC allows an unauthorized attacker to execute code over a network.","description":"Use after free in Microsoft QUIC allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-10-13T21:32:33Z","modified":"2026-10-13T21:32:33Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T15:13:12.661896Z"}],"nvd":[{"id":"CVE-2026-100219","description":"Use after free in Microsoft QUIC allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-10-13T19:17:42.163Z","modified":"2026-11-03T23:17:23.917Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-416"],"updated_at":"2026-11-04T01:48:36.614057Z"}]}}