{"id":"CVE-2026-112763","kind":"vulnerability","aliases":["CVE-2026-112763"],"related":[],"title":"Windows: Cloud Files driver use-after-free lets a local user gain higher privileges","description":"Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.","summary":"A memory-handling bug in the Windows Cloud Files Mini Filter Driver lets a logged-in user corrupt memory and elevate their privileges on the same machine. An attacker needs a local account and can then act with system-level rights.","severity":"high","cvss":7.0,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["endpoints","infrastructure","onedrive","windows"],"not_affected_if":["no-local-untrusted-users","non-windows"],"how_to_check":"- Check the installed Windows build with `winver` and compare it to Microsoft's security update guide entry for CVE-2026-112763\n- Confirm Windows Update has applied the latest cumulative update","fix":null,"status":"open","published_at":"2026-11-10T19:18:39+00:00","first_seen_at":"2026-11-10T19:24:32+00:00","triaged_at":"2026-11-10T19:53:46+00:00","updated_at":"2026-11-10T19:53:46+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-11-10T19:53:46Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Windows: Cloud Files driver use-after-free lets a local user gain higher privileges","impact":"high","summary":"A memory-handling bug in the Windows Cloud Files Mini Filter Driver lets a logged-in user corrupt memory and elevate their privileges on the same machine. An attacker needs a local account and can then act with system-level rights.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows","endpoints","onedrive"],"confidence":0.5,"fix_status":"unknown","needs_auth":"yes","worst_case":"local user gains system-level privileges on the machine","analyst_note":"Find Microsoft's security update guide entry for CVE-2026-112763 to confirm affected builds and the patched update.","how_to_check":"- Check the installed Windows build with `winver` and compare it to Microsoft's security update guide entry for CVE-2026-112763\n- Confirm Windows Update has applied the latest cumulative update\n- unknown for other checks, as the sources do not say","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["no-local-untrusted-users","non-windows"],"who_is_affected":"Machines running Windows with the Cloud Files Mini Filter Driver present, which is used by OneDrive and other cloud sync features. An attacker must already have a local user account on the machine. The sources do not say which Windows builds are affected.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000717,"input_tokens":4498,"output_tokens":534,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Find Microsoft's security update guide entry for CVE-2026-112763 to confirm affected builds and the patched update.","search":"'-112763':18A,21A '-2026':17A,20A 'account':60B 'act':64B 'allow':80C 'attack':56B,83C 'author':82C 'bug':30B 'cloud':2A,34B,75C 'corrupt':45B 'cve':16A,19A 'driver':4A,38B,79C 'elev':48B,85C 'endpoint':22B 'file':3A,35B,76C 'filter':37B,78C 'free':8A,72C 'gain':13A 'handl':29B 'higher':14A 'infrastructur':23B 'let':9A,39B 'level':68B 'local':11A,59B,87C 'log':42B 'logged-in':41B 'machin':54B 'memori':28B,46B 'memory-handl':27B 'mini':36B,77C 'need':57B 'onedr':24B 'privileg':15A,50B,86C 'right':69B 'system':67B 'system-level':66B 'use':6A,70C 'use-after-fre':5A 'user':12A,44B 'window':1A,25B,33B,74C","nicknames":[],"mitigations":[],"who_affected":"Machines running Windows with the Cloud Files Mini Filter Driver present, which is used by OneDrive and other cloud sync features. An attacker must already have a local user account on the machine. The sources do not say which Windows builds are affected.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["endpoints","high","infrastructure","onedrive","windows"],"campaign_type":null,"search_a":"'-112763':18A,21A '-2026':17A,20A 'cloud':2A 'cve':16A,19A 'driver':4A 'file':3A 'free':8A 'gain':13A 'higher':14A 'let':9A 'local':11A 'privileg':15A 'use':6A 'use-after-fre':5A 'user':12A 'window':1A","search_b":"'account':60B 'act':64B 'attack':56B 'bug':30B 'cloud':34B 'corrupt':45B 'driver':38B 'elev':48B 'endpoint':22B 'file':35B 'filter':37B 'handl':29B 'infrastructur':23B 'let':39B 'level':68B 'local':59B 'log':42B 'logged-in':41B 'machin':54B 'memori':28B,46B 'memory-handl':27B 'mini':36B 'need':57B 'onedr':24B 'privileg':50B 'right':69B 'system':67B 'system-level':66B 'user':44B 'window':25B,33B","search_c":"'allow':80C 'attack':83C 'author':82C 'cloud':75C 'driver':79C 'elev':85C 'file':76C 'filter':78C 'free':72C 'local':87C 'mini':77C 'privileg':86C 'use':70C 'window':74C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:18:39+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:H/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-2026-112763","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-112763","severity":null,"published_at":"2026-11-10T19:18:39+00:00","modified_at":"2026-11-10T19:18:39+00:00","first_seen_at":"2026-11-10T19:24:32+00:00","fetched_at":"2026-11-10T19:24:32+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"}