{"id":"CVE-2026-96055","kind":"vulnerability","aliases":["CVE-2026-96055"],"related":[],"title":"Windows USB driver heap overflow lets a local user gain higher privileges","description":"Heap-based buffer overflow in Windows USB Driver allows an authorized attacker to elevate privileges locally.","summary":"A heap-based buffer overflow in the Windows USB driver lets an attacker who already has a local account raise their privileges. The sources give no more detail about the trigger or the affected Windows versions.","severity":"high","cvss":7.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["infrastructure","local","privilege-escalation","usb","windows"],"not_affected_if":["no-local-untrusted-users"],"how_to_check":"Unknown: affected Windows builds not found. Look up CVE-2026-96055 in the Microsoft Security Update Guide and compare your installed KB (Get-HotFix) with the listed patch.","fix":null,"status":"open","published_at":"2026-11-10T19:22:02+00:00","first_seen_at":"2026-11-10T19:25:28+00:00","triaged_at":"2026-11-10T19:36:40+00:00","updated_at":"2026-11-10T19:58:02+00:00","category":"infrastructure","confidence":0.2,"triage":{"at":"2026-11-10T19:36:40Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Windows USB driver heap overflow lets a local user gain higher privileges","impact":"high","summary":"A heap-based buffer overflow in the Windows USB driver lets an attacker who already has a local account raise their privileges. The sources give no more detail about the trigger or the affected Windows versions.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows","usb"],"confidence":0.5,"fix_status":"unknown","needs_auth":"yes","worst_case":"local user gains SYSTEM-level control of the machine","analyst_note":"Check the Microsoft security update guide for CVE-2026-96055 for affected Windows builds and the patch KB.","how_to_check":"- unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["no-local-untrusted-users"],"who_is_affected":"Windows machines with the affected USB driver. An attacker needs a local account on the machine first, so systems with only trusted local users carry less risk. The sources do not list affected Windows builds.","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000655,"input_tokens":4492,"output_tokens":411,"severity_before":"high"},"analyst_status":"done","analyst_note":"Check the Microsoft security update guide for CVE-2026-96055 for affected Windows builds and the patch KB.","search":"'-2026':14A,17A '-96055':15A,18A 'account':45B 'affect':60B 'allow':72C 'alreadi':41B 'attack':39B,75C 'author':74C 'base':29B,65C 'buffer':30B,66C 'cve':13A,16A 'detail':54B 'driver':3A,36B,71C 'elev':77C 'escal':23B 'gain':10A 'give':51B 'heap':4A,28B,64C 'heap-bas':27B,63C 'higher':11A 'infrastructur':19B 'let':6A,37B 'local':8A,20B,44B,79C 'overflow':5A,31B,67C 'privileg':12A,22B,48B,78C 'privilege-escal':21B 'rais':46B 'sourc':50B 'trigger':57B 'usb':2A,24B,35B,70C 'user':9A 'version':62B 'window':1A,25B,34B,61B,69C","nicknames":[],"mitigations":[],"who_affected":"Windows machines with the affected USB driver. An attacker needs a local account on the machine first, so systems with only trusted local users carry less risk. The sources do not list affected Windows builds.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["high","infrastructure","local","privilegeescalation","usb","windows"],"campaign_type":null,"search_a":"'-2026':14A,17A '-96055':15A,18A 'cve':13A,16A 'driver':3A 'gain':10A 'heap':4A 'higher':11A 'let':6A 'local':8A 'overflow':5A 'privileg':12A 'usb':2A 'user':9A 'window':1A","search_b":"'account':45B 'affect':60B 'alreadi':41B 'attack':39B 'base':29B 'buffer':30B 'detail':54B 'driver':36B 'escal':23B 'give':51B 'heap':28B 'heap-bas':27B 'infrastructur':19B 'let':37B 'local':20B,44B 'overflow':31B 'privileg':22B,48B 'privilege-escal':21B 'rais':46B 'sourc':50B 'trigger':57B 'usb':24B,35B 'version':62B 'window':25B,34B,61B","search_c":"'allow':72C 'attack':75C 'author':74C 'base':65C 'buffer':66C 'driver':71C 'elev':77C 'heap':64C 'heap-bas':63C 'local':79C 'overflow':67C 'privileg':78C 'usb':70C 'window':69C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:22:02+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-2026-96055","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-96055","severity":null,"published_at":"2026-11-10T19:22:02+00:00","modified_at":"2026-11-10T19:22:03+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-2026-96055:2588","url":null,"severity":null,"published_at":"2026-11-10T19:58:02+00:00","modified_at":"2026-11-10T19:58:02+00:00","first_seen_at":"2026-11-10T19:58:02+00:00","fetched_at":"2026-11-10T19:58:02+00:00","note":"Could not read primary source: MSRC update guide and CVRF returned empty (JS-only), NVD page empty, no web results for this id. No versions, KB or exploitation info found; nothing verified. Needs MSRC page read to settle affected builds and KB."}],"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"}