{"id":"CVE-2026-96037","kind":"vulnerability","aliases":["CVE-2026-96037"],"related":[],"title":"Windows User Manager Service: heap overflow lets a local user gain higher privileges","description":"Heap-based buffer overflow in Windows User Manager Service allows an authorized attacker to elevate privileges locally.","summary":"A heap-based buffer overflow in the Windows User Manager Service lets an attacker who already has a local account raise their privileges. The sources do not describe the exact trigger or affected builds.","severity":"high","cvss":7.8,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"Windows User Manager Service","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["infrastructure","windows"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:22:00+00:00","first_seen_at":"2026-11-10T19:25:28+00:00","triaged_at":"2026-11-10T19:36:45+00:00","updated_at":"2026-11-10T20:03:40+00:00","category":"infrastructure","confidence":0.3,"triage":{"at":"2026-11-10T19:36:45Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Windows User Manager Service: heap overflow lets a local user gain higher privileges","impact":"high","summary":"A heap-based buffer overflow in the Windows User Manager Service lets an attacker who already has a local account raise their privileges. The sources do not describe the exact trigger or affected builds.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows"],"confidence":0.5,"fix_status":"unknown","needs_auth":"yes","worst_case":"local attacker gains elevated system privileges on the Windows machine","analyst_note":"Find Microsoft's advisory for CVE-2026-96037 for affected Windows builds, fixed update, and any check.","how_to_check":"- unknown","plain_action":"","product_name":"Windows User Manager Service","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"unknown","product_ecosystem":"vendor","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000637,"input_tokens":4494,"output_tokens":375,"severity_before":"high"},"analyst_status":"done","analyst_note":"Find Microsoft's advisory for CVE-2026-96037 for affected Windows builds, fixed update, and any check.","search":"'-2026':15A,18A '-96037':16A,19A 'account':46B 'affect':59B 'allow':71C 'alreadi':42B 'attack':40B,74C 'author':73C 'base':29B,63C 'buffer':30B,64C 'build':60B 'cve':14A,17A 'describ':54B 'elev':76C 'exact':56B 'gain':11A 'heap':5A,28B,62C 'heap-bas':27B,61C 'higher':12A 'infrastructur':24B 'let':7A,38B 'local':9A,45B,78C 'manag':3A,36B,69C 'manager':22A 'overflow':6A,31B,65C 'privileg':13A,49B,77C 'rais':47B 'servic':4A,37B,70C 'service':23A 'sourc':51B 'trigger':57B 'user':2A,10A,21A,35B,68C 'window':1A,25B,34B,67C 'windows':20A","nicknames":[],"mitigations":[],"who_affected":null,"tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":["usermanagerservice","windowsusermanagerservice"],"ptokens":["manager","service","user","windows"],"labels":["high","infrastructure","vendor","windows"],"campaign_type":null,"search_a":"'-2026':15A,18A '-96037':16A,19A 'cve':14A,17A 'gain':11A 'heap':5A 'higher':12A 'let':7A 'local':9A 'manag':3A 'manager':22A 'overflow':6A 'privileg':13A 'servic':4A 'service':23A 'user':2A,10A,21A 'window':1A 'windows':20A","search_b":"'account':46B 'affect':59B 'alreadi':42B 'attack':40B 'base':29B 'buffer':30B 'build':60B 'describ':54B 'exact':56B 'heap':28B 'heap-bas':27B 'infrastructur':24B 'let':38B 'local':45B 'manag':36B 'overflow':31B 'privileg':49B 'rais':47B 'servic':37B 'sourc':51B 'trigger':57B 'user':35B 'window':25B,34B","search_c":"'allow':71C 'attack':74C 'author':73C 'base':63C 'buffer':64C 'elev':76C 'heap':62C 'heap-bas':61C 'local':78C 'manag':69C 'overflow':65C 'privileg':77C 'servic':70C 'user':68C 'window':67C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:22:00+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-2026-96037","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-96037","severity":null,"published_at":"2026-11-10T19:22:00+00:00","modified_at":"2026-11-10T19:22:00+00:00","first_seen_at":"2026-11-10T19:25:28+00:00","fetched_at":"2026-11-10T19:25:28+00:00","note":null},{"source":"analyst","external_id":"CVE-2026-96037:2600","url":null,"severity":null,"published_at":"2026-11-10T20:03:40+00:00","modified_at":"2026-11-10T20:03:40+00:00","first_seen_at":"2026-11-10T20:03:40+00:00","fetched_at":"2026-11-10T20:03:40+00:00","note":"No Microsoft advisory retrievable: MSRC update-guide page is JS-only and returned empty, NVD page empty, web search found nothing for this id (similar ids 96937/62832 are different CVEs). Affected builds, KB and fix remain unknown; nothing verified. Settle by reading the MSRC page for the CVE in a browser or the Nov 2026 CVRF."}],"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"}