{"id":"CVE-2026-71338","aliases":["EUVD-2026-73095","GHSA-xphv-w9hp-fx8m"],"status":"published","title":"Windows Failover Cluster Elevation of Privilege Vulnerability","description":"Double free in Windows Failover Cluster allows an authorized attacker to elevate privileges locally.","severity":{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00276,"percentile":0.20237,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-415"],"published":"2026-09-08T17:12:28Z","modified":"2026-11-10T21:31:14Z","products":[{"vendor":"microsoft","product":"windows 10 version 1607"},{"vendor":"microsoft","product":"windows 10 version 1809"},{"vendor":"microsoft","product":"windows server 2012"},{"vendor":"microsoft","product":"windows server 2012 (server core installation)"},{"vendor":"microsoft","product":"windows server 2012 r2"},{"vendor":"microsoft","product":"windows server 2012 r2 (server core installation)"},{"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_server_2012"},{"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-2026-71338","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71338"},{"url":"https://github.com/advisories/GHSA-xphv-w9hp-fx8m"}],"sources":{"cve":[{"id":"CVE-2026-71338","title":"Windows Failover Cluster Elevation of Privilege Vulnerability","description":"Double free in Windows Failover Cluster allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-09-08T17:12:28.183Z","modified":"2026-11-10T21:31:14.392Z","cvss":[{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"medium","assessor":"cna"}],"cwes":["CWE-415"],"updated_at":"2026-11-10T22:48:53.557052Z"}],"euvd":[{"id":"EUVD-2026-73095","description":"Double free in Windows Failover Cluster allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-09-08T17:12:28Z","modified":"2026-11-10T21:31:14Z","cvss":[{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-10T22:23:53.008995Z"}],"ghsa":[{"id":"GHSA-xphv-w9hp-fx8m","title":"Double free in Windows Failover Cluster allows an authorized attacker to elevate privileges locally.","description":"Double free in Windows Failover Cluster allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-09-08T18:33:08Z","modified":"2026-09-08T18:33:22Z","cvss":[{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium"}],"cwes":["CWE-415"],"updated_at":"2026-11-02T15:11:32.915208Z"}],"nvd":[{"id":"CVE-2026-71338","description":"Double free in Windows Failover Cluster allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-09-08T18:20:13.573Z","modified":"2026-09-24T23:18:43.857Z","cvss":[{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-415"],"updated_at":"2026-11-02T14:12:45.264578Z"}]}}