{"id":"CVE-2026-112759","kind":"vulnerability","aliases":["CVE-2026-112759"],"related":[],"title":"Windows Task Scheduler: heap overflow lets a local user gain higher privileges","description":"Heap-based buffer overflow in Windows Task Scheduler allows an authorized attacker to elevate privileges locally.","summary":"Windows Task Scheduler has a heap-based buffer overflow. An attacker who already has a local account can use it to elevate their privileges.","severity":"high","cvss":7.0,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["infrastructure","task-scheduler","windows"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:18:38+00:00","first_seen_at":"2026-11-10T19:24:32+00:00","triaged_at":"2026-11-10T19:53:47+00:00","updated_at":"2026-11-10T19:53:47+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-11-10T19:53:47Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Windows Task Scheduler: heap overflow lets a local user gain higher privileges","impact":"high","summary":"Windows Task Scheduler has a heap-based buffer overflow. An attacker who already has a local account can use it to elevate their privileges.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows","task-scheduler"],"confidence":0.6,"fix_status":"unknown","needs_auth":"yes","worst_case":"local attacker gains SYSTEM-level privileges on the machine","analyst_note":"Check the Microsoft Security Update Guide entry for CVE-2026-112759 for affected builds and the patch.","how_to_check":"- unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Machines running Windows where local users can log in or run code. The sources do not say which Windows builds are affected or whether a fix exists yet. Systems with no untrusted local accounts carry less risk.","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000649,"input_tokens":4496,"output_tokens":398,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Check the Microsoft Security Update Guide entry for CVE-2026-112759 for affected builds and the patch.","search":"'-112759':15A,18A '-2026':14A,17A 'account':41B 'allow':58C 'alreadi':37B 'attack':35B,61C 'author':60C 'base':31B,51C 'buffer':32B,52C 'cve':13A,16A 'elev':46B,63C 'gain':10A 'heap':4A,30B,50C 'heap-bas':29B,49C 'higher':11A 'infrastructur':19B 'let':6A 'local':8A,40B,65C 'overflow':5A,33B,53C 'privileg':12A,48B,64C 'schedul':3A,22B,26B,57C 'task':2A,21B,25B,56C 'task-schedul':20B 'use':43B 'user':9A 'window':1A,23B,24B,55C","nicknames":[],"mitigations":[],"who_affected":"Machines running Windows where local users can log in or run code. The sources do not say which Windows builds are affected or whether a fix exists yet. Systems with no untrusted local accounts carry less risk.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["high","infrastructure","taskscheduler","windows"],"campaign_type":null,"search_a":"'-112759':15A,18A '-2026':14A,17A 'cve':13A,16A 'gain':10A 'heap':4A 'higher':11A 'let':6A 'local':8A 'overflow':5A 'privileg':12A 'schedul':3A 'task':2A 'user':9A 'window':1A","search_b":"'account':41B 'alreadi':37B 'attack':35B 'base':31B 'buffer':32B 'elev':46B 'heap':30B 'heap-bas':29B 'infrastructur':19B 'local':40B 'overflow':33B 'privileg':48B 'schedul':22B,26B 'task':21B,25B 'task-schedul':20B 'use':43B 'window':23B,24B","search_c":"'allow':58C 'attack':61C 'author':60C 'base':51C 'buffer':52C 'elev':63C 'heap':50C 'heap-bas':49C 'local':65C 'overflow':53C 'privileg':64C 'schedul':57C 'task':56C 'window':55C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:18:38+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-2026-112759","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-112759","severity":null,"published_at":"2026-11-10T19:18:38+00:00","modified_at":"2026-11-10T19:18:38+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"}