{"id":"CVE-2026-105559","kind":"vulnerability","aliases":["CVE-2026-105559"],"related":[],"title":"Windows Active Directory: authorized network user can deny service","description":"No cwe for this issue in Windows Active Directory allows an authorized attacker to deny service over a network.","summary":"Windows Active Directory has a flaw that lets an authorized attacker take down a service over the network. The sources do not say which component or versions are affected.","severity":"medium","cvss":6.5,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["active-directory","infrastructure","windows"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:17:58+00:00","first_seen_at":"2026-11-10T19:24:19+00:00","triaged_at":"2026-11-10T19:58:12+00:00","updated_at":"2026-11-10T19:58:12+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-11-10T19:58:12Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Windows Active Directory: authorized network user can deny service","impact":"low","summary":"Windows Active Directory has a flaw that lets an authorized attacker take down a service over the network. The sources do not say which component or versions are affected.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows","active-directory"],"confidence":0.5,"fix_status":"unknown","needs_auth":"yes","worst_case":"Denial of service against Active Directory over the network","analyst_note":"Check the NVD entry and Microsoft Security Update Guide for CVE-2026-105559 for affected versions, the fixed build and whether a patch exists.","how_to_check":"unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Organizations running Windows Active Directory domain controllers are the systems to look at; the sources do not name affected versions or the exact component. unknown","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000636,"input_tokens":4483,"output_tokens":375,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-105559':12A,15A '-2026':11A,14A 'activ':2A,17B,22B,57C 'active-directori':16B 'affect':49B 'allow':59C 'attack':31B,62C 'author':4A,30B,61C 'compon':45B 'cve':10A,13A 'cwe':51C 'deni':8A,64C 'directori':3A,18B,23B,58C 'flaw':26B 'infrastructur':19B 'issu':54C 'let':28B 'network':5A,38B,68C 'say':43B 'servic':9A,35B,65C 'sourc':40B 'take':32B 'user':6A 'version':47B 'window':1A,20B,21B,56C","nicknames":[],"mitigations":[],"who_affected":"Organizations running Windows Active Directory domain controllers are the systems to look at; the sources do not name affected versions or the exact component. unknown","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["activedirectory","infrastructure","medium","windows"],"campaign_type":null,"search_a":"'-105559':12A,15A '-2026':11A,14A 'activ':2A 'author':4A 'cve':10A,13A 'deni':8A 'directori':3A 'network':5A 'servic':9A 'user':6A 'window':1A","search_b":"'activ':17B,22B 'active-directori':16B 'affect':49B 'attack':31B 'author':30B 'compon':45B 'directori':18B,23B 'flaw':26B 'infrastructur':19B 'let':28B 'network':38B 'say':43B 'servic':35B 'sourc':40B 'take':32B 'version':47B 'window':20B,21B","search_c":"'activ':57C 'allow':59C 'attack':62C 'author':61C 'cwe':51C 'deni':64C 'directori':58C 'issu':54C 'network':68C 'servic':65C 'window':56C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:17:58+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-105559","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-105559","severity":null,"published_at":"2026-11-10T19:17:58+00:00","modified_at":"2026-11-10T19:17:58+00:00","first_seen_at":"2026-11-10T19:24:19+00:00","fetched_at":"2026-11-10T19:24:19+00:00","note":null}],"documents":[],"disclosures":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}