{"id":"CVE-2026-119900","kind":"vulnerability","aliases":["CVE-2026-119900"],"related":[],"title":"Windows NTFS: out-of-bounds read lets a local user gain higher privileges","description":"Out-of-bounds read in Windows NTFS allows an authorized attacker to elevate privileges locally.","summary":"A flaw in how Windows NTFS reads memory lets an attacker who already has a local account read past the end of a buffer. The sources say this lets them elevate privileges on the machine.","severity":"high","cvss":7.3,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["infrastructure","ntfs","windows"],"not_affected_if":["no-local-untrusted-users"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:20:10+00:00","first_seen_at":"2026-11-10T19:25:02+00:00","triaged_at":"2026-11-10T19:47:41+00:00","updated_at":"2026-11-10T19:47:41+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-11-10T19:47:41Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Windows NTFS: out-of-bounds read lets a local user gain higher privileges","impact":"high","summary":"A flaw in how Windows NTFS reads memory lets an attacker who already has a local account read past the end of a buffer. The sources say this lets them elevate privileges on the machine.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows","ntfs"],"confidence":0.5,"fix_status":"unknown","needs_auth":"yes","worst_case":"local attacker gains SYSTEM-level privileges on the machine","analyst_note":"Find the Microsoft security update guide entry for CVE-2026-119900 to get affected Windows builds and the patch KB; the NVD record alone gives no fix.","how_to_check":"unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["no-local-untrusted-users"],"who_is_affected":"Windows machines with NTFS volumes, which is effectively every Windows system. The sources do not name affected Windows builds or whether a specific configuration is required. Attackers must already have a local account, so systems with no untrusted local users carry less risk.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000673,"input_tokens":4486,"output_tokens":449,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Find the Microsoft security update guide entry for CVE-2026-119900 to get affected Windows builds and the patch KB; the NVD record alone gives no fix.","search":"'-119900':17A,20A '-2026':16A,19A 'account':40B 'allow':67C 'alreadi':36B 'attack':34B,70C 'author':69C 'bound':6A,62C 'buffer':47B 'cve':15A,18A 'elev':54B,72C 'end':44B 'flaw':25B 'gain':12A 'higher':13A 'infrastructur':21B 'let':8A,32B,52B 'local':10A,39B,74C 'machin':58B 'memori':31B 'ntfs':2A,22B,29B,66C 'out-of-bound':3A,59C 'past':42B 'privileg':14A,55B,73C 'read':7A,30B,41B,63C 'say':50B 'sourc':49B 'user':11A 'window':1A,23B,28B,65C","nicknames":[],"mitigations":[],"who_affected":"Windows machines with NTFS volumes, which is effectively every Windows system. The sources do not name affected Windows builds or whether a specific configuration is required. Attackers must already have a local account, so systems with no untrusted local users carry less risk.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["high","infrastructure","ntfs","windows"],"campaign_type":null,"search_a":"'-119900':17A,20A '-2026':16A,19A 'bound':6A 'cve':15A,18A 'gain':12A 'higher':13A 'let':8A 'local':10A 'ntfs':2A 'out-of-bound':3A 'privileg':14A 'read':7A 'user':11A 'window':1A","search_b":"'account':40B 'alreadi':36B 'attack':34B 'buffer':47B 'elev':54B 'end':44B 'flaw':25B 'infrastructur':21B 'let':32B,52B 'local':39B 'machin':58B 'memori':31B 'ntfs':22B,29B 'past':42B 'privileg':55B 'read':30B,41B 'say':50B 'sourc':49B 'window':23B,28B","search_c":"'allow':67C 'attack':70C 'author':69C 'bound':62C 'elev':72C 'local':74C 'ntfs':66C 'out-of-bound':59C 'privileg':73C 'read':63C 'window':65C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:20:10+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-119900","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119900","severity":null,"published_at":"2026-11-10T19:20:10+00:00","modified_at":"2026-11-10T19:20:10+00:00","first_seen_at":"2026-11-10T19:25:02+00:00","fetched_at":"2026-11-10T19:25:02+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"}