{"id":"CVE-2026-83648","aliases":["EUVD-2026-99312","GHSA-f33p-wc9r-mhxg"],"status":"published","title":"Windows Active Directory Domain Services Denial of Service Vulnerability","description":"Null pointer dereference in Active Directory Domain Services allows an authorized attacker to deny service over a network.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.01231,"percentile":0.69336,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-476"],"published":"2026-10-13T18:59:47Z","modified":"2026-11-10T20:36:02Z","products":[{"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 2022"},{"vendor":"microsoft","product":"windows server 2025"},{"vendor":"microsoft","product":"windows server 2025 (server core installation)"},{"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_2022"},{"vendor":"microsoft","product":"windows_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83648","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-83648"},{"url":"https://github.com/advisories/GHSA-f33p-wc9r-mhxg"}],"sources":{"cve":[{"id":"CVE-2026-83648","title":"Windows Active Directory Domain Services Denial of Service Vulnerability","description":"Null pointer dereference in Active Directory Domain Services allows an authorized attacker to deny service over a network.","status":"published","published":"2026-10-13T18:59:47.286Z","modified":"2026-11-10T20:36:02.239Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"medium","assessor":"cna"}],"cwes":["CWE-476"],"updated_at":"2026-11-10T22:18:28.707469Z"}],"euvd":[{"id":"EUVD-2026-99312","description":"Null pointer dereference in Active Directory Domain Services allows an authorized attacker to deny service over a network.","status":"published","published":"2026-10-13T18:59:47Z","modified":"2026-11-10T20:36:02Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-10T21:23:23.099302Z"}],"ghsa":[{"id":"GHSA-f33p-wc9r-mhxg","title":"Null pointer dereference in Active Directory Domain Services allows an authorized attacker to...","description":"Null pointer dereference in Active Directory Domain Services allows an authorized attacker to deny service over a network.","status":"published","published":"2026-10-13T21:34:31Z","modified":"2026-10-13T21:34:32Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T15:13:16.244853Z"}],"nvd":[{"id":"CVE-2026-83648","description":"Null pointer dereference in Active Directory Domain Services allows an authorized attacker to deny service over a network.","status":"published","published":"2026-10-13T19:20:05.953Z","modified":"2026-10-29T18:22:06.463Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:12:57.603498Z"}]}}