{"id":"CVE-2026-119892","kind":"vulnerability","aliases":["CVE-2026-119892"],"related":[],"title":"Windows Installer: authorization flaw lets a local user gain higher privileges","description":"Incorrect authorization in Windows Installer allows an authorized attacker to elevate privileges locally.","summary":"Windows Installer has an incorrect authorization check that lets an attacker who already has a local account raise their privileges. The sources give no further detail on the exact trigger.","severity":"high","cvss":7.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["infrastructure","windows","windows-installer"],"not_affected_if":["unknown"],"how_to_check":"- Check the Windows build with `winver` and compare it against the Microsoft security update guide entry for CVE-2026-119892","fix":null,"status":"open","published_at":"2026-11-10T19:20:09+00:00","first_seen_at":"2026-11-10T19:25:01+00:00","triaged_at":"2026-11-10T19:40:21+00:00","updated_at":"2026-11-10T19:40:21+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-11-10T19:40:21Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Windows Installer: authorization flaw lets a local user gain higher privileges","impact":"high","summary":"Windows Installer has an incorrect authorization check that lets an attacker who already has a local account raise their privileges. The sources give no further detail on the exact trigger.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows","windows-installer"],"confidence":0.5,"fix_status":"unknown","needs_auth":"yes","worst_case":"local user gains administrator-level control of the machine","analyst_note":"Find Microsoft's advisory for CVE-2026-119892 to confirm affected Windows builds and the patch.","how_to_check":"- Check the Windows build with `winver` and compare it against the Microsoft security update guide entry for CVE-2026-119892\n- unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["unknown"],"who_is_affected":"Any Windows machine with the Windows Installer service may be exposed, and the attacker needs a local account first. The sources do not say which Windows versions or configurations are affected, so treat all supported Windows systems as in scope until Microsoft's advisory is checked.","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000679,"input_tokens":4482,"output_tokens":461,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Find Microsoft's advisory for CVE-2026-119892 to confirm affected Windows builds and the patch.","search":"'-119892':14A,17A '-2026':13A,16A 'account':39B 'allow':58C 'alreadi':35B 'attack':33B,61C 'author':3A,28B,54C,60C 'check':29B 'cve':12A,15A 'detail':48B 'elev':63C 'exact':51B 'flaw':4A 'gain':9A 'give':45B 'higher':10A 'incorrect':27B,53C 'infrastructur':18B 'instal':2A,22B,24B,57C 'let':5A,31B 'local':7A,38B,65C 'privileg':11A,42B,64C 'rais':40B 'sourc':44B 'trigger':52B 'user':8A 'window':1A,19B,21B,23B,56C 'windows-instal':20B","nicknames":[],"mitigations":[],"who_affected":"Any Windows machine with the Windows Installer service may be exposed, and the attacker needs a local account first. The sources do not say which Windows versions or configurations are affected, so treat all supported Windows systems as in scope until Microsoft's advisory is checked.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["high","infrastructure","windows","windowsinstaller"],"campaign_type":null,"search_a":"'-119892':14A,17A '-2026':13A,16A 'author':3A 'cve':12A,15A 'flaw':4A 'gain':9A 'higher':10A 'instal':2A 'let':5A 'local':7A 'privileg':11A 'user':8A 'window':1A","search_b":"'account':39B 'alreadi':35B 'attack':33B 'author':28B 'check':29B 'detail':48B 'exact':51B 'give':45B 'incorrect':27B 'infrastructur':18B 'instal':22B,24B 'let':31B 'local':38B 'privileg':42B 'rais':40B 'sourc':44B 'trigger':52B 'window':19B,21B,23B 'windows-instal':20B","search_c":"'allow':58C 'attack':61C 'author':54C,60C 'elev':63C 'incorrect':53C 'instal':57C 'local':65C 'privileg':64C 'window':56C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:20:09+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-119892","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119892","severity":null,"published_at":"2026-11-10T19:20:09+00:00","modified_at":"2026-11-10T19:20:09+00:00","first_seen_at":"2026-11-10T19:25:01+00:00","fetched_at":"2026-11-10T19:25:01+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"}