{"id":"CVE-2026-72936","aliases":["EUVD-2026-73664","GHSA-fmm5-9jvw-32hg"],"status":"published","title":"Windows SMB Client Remote Code Execution Vulnerability","description":"Use after free in Windows SMB Client allows an unauthorized attacker to execute code over a network.","severity":{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00707,"percentile":0.53877,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-416"],"published":"2026-09-08T17:17:04Z","modified":"2026-11-10T21:36:07Z","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 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_server_2022"},{"vendor":"microsoft","product":"windows_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-72936","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72936"},{"url":"https://github.com/advisories/GHSA-fmm5-9jvw-32hg"}],"sources":{"cve":[{"id":"CVE-2026-72936","title":"Windows SMB Client Remote Code Execution Vulnerability","description":"Use after free in Windows SMB Client allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-09-08T17:17:04.555Z","modified":"2026-11-10T21:36:07.635Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-416"],"updated_at":"2026-11-10T22:48:53.557052Z"}],"euvd":[{"id":"EUVD-2026-73664","description":"Use after free in Windows SMB Client allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-09-08T17:17:04Z","modified":"2026-11-10T21:36:07Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-10T22:23:47.576985Z"}],"ghsa":[{"id":"GHSA-fmm5-9jvw-32hg","title":"Use after free in Windows SMB Client allows an unauthorized attacker to execute code over a network.","description":"Use after free in Windows SMB Client allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-09-08T18:33:10Z","modified":"2026-09-08T18:33:42Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T15:11:33.442964Z"}],"nvd":[{"id":"CVE-2026-72936","description":"Use after free in Windows SMB Client allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-09-08T18:20:18.347Z","modified":"2026-09-22T13:02:51.36Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:12:45.264578Z"}]}}