{"id":"CVE-2026-105568","kind":"vulnerability","aliases":["CVE-2026-105568"],"related":[],"title":"Active Directory Domain Services: out-of-bounds read lets an authorized user crash service","description":"Out-of-bounds read in Active Directory Domain Services allows an authorized attacker to deny service over a network.","summary":"Active Directory Domain Services has an out-of-bounds read that an authorized attacker can trigger over the network to cause a denial of service. The sources do not describe a data read or code execution beyond the service disruption.","severity":"medium","cvss":6.5,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["active-directory","domain-controllers","infrastructure","windows-server"],"not_affected_if":["auth-required","no-domain-controllers"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:17:59+00:00","first_seen_at":"2026-11-10T19:24:20+00:00","triaged_at":"2026-11-10T19:58:12+00:00","updated_at":"2026-11-10T19:58:12+00:00","category":"infrastructure","confidence":0.4,"triage":{"at":"2026-11-10T19:58:12Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Active Directory Domain Services: out-of-bounds read lets an authorized user crash service","impact":"low","summary":"Active Directory Domain Services has an out-of-bounds read that an authorized attacker can trigger over the network to cause a denial of service. The sources do not describe a data read or code execution beyond the service disruption.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["active-directory","windows-server","domain-controllers"],"confidence":0.4,"fix_status":"unknown","needs_auth":"yes","worst_case":"Domain Services becomes unavailable to network clients, disrupting authentication","analyst_note":"Find the vendor advisory for CVE-2026-105568 to confirm affected Windows Server versions and the fixed update.","how_to_check":"- unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["no-domain-controllers","auth-required"],"who_is_affected":"Organizations running Active Directory Domain Services domain controllers where attackers hold a valid account. The sources do not state the affected versions or required configuration. unknown","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000666,"input_tokens":4489,"output_tokens":435,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-105568':18A,21A '-2026':17A,20A 'activ':1A,23B,32B,79C 'active-directori':22B 'allow':83C 'attack':46B,86C 'author':12A,45B,85C 'beyond':69B 'bound':8A,41B,76C 'caus':53B 'code':67B 'control':27B 'crash':14A 'cve':16A,19A 'data':64B 'deni':88C 'denial':55B 'describ':62B 'directori':2A,24B,33B,80C 'disrupt':72B 'domain':3A,26B,34B,81C 'domain-control':25B 'execut':68B 'infrastructur':28B 'let':10A 'network':51B,92C 'out-of-bound':5A,38B,73C 'read':9A,42B,65B,77C 'server':31B 'servic':4A,15A,35B,57B,71B,82C,89C 'sourc':59B 'trigger':48B 'user':13A 'window':30B 'windows-serv':29B","nicknames":[],"mitigations":[],"who_affected":"Organizations running Active Directory Domain Services domain controllers where attackers hold a valid account. The sources do not state the affected versions or required configuration. unknown","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["activedirectory","domaincontrollers","infrastructure","medium","windowsserver"],"campaign_type":null,"search_a":"'-105568':18A,21A '-2026':17A,20A 'activ':1A 'author':12A 'bound':8A 'crash':14A 'cve':16A,19A 'directori':2A 'domain':3A 'let':10A 'out-of-bound':5A 'read':9A 'servic':4A,15A 'user':13A","search_b":"'activ':23B,32B 'active-directori':22B 'attack':46B 'author':45B 'beyond':69B 'bound':41B 'caus':53B 'code':67B 'control':27B 'data':64B 'denial':55B 'describ':62B 'directori':24B,33B 'disrupt':72B 'domain':26B,34B 'domain-control':25B 'execut':68B 'infrastructur':28B 'network':51B 'out-of-bound':38B 'read':42B,65B 'server':31B 'servic':35B,57B,71B 'sourc':59B 'trigger':48B 'window':30B 'windows-serv':29B","search_c":"'activ':79C 'allow':83C 'attack':86C 'author':85C 'bound':76C 'deni':88C 'directori':80C 'domain':81C 'network':92C 'out-of-bound':73C 'read':77C 'servic':82C,89C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:17:59+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-2026-105568","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-105568","severity":null,"published_at":"2026-11-10T19:17:59+00:00","modified_at":"2026-11-10T19:17:59+00:00","first_seen_at":"2026-11-10T19:24:20+00:00","fetched_at":"2026-11-10T19:24:20+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"}