{"id":"CVE-2026-118229","kind":"vulnerability","aliases":["CVE-2026-118229"],"related":[],"title":"Windows: heap overflow in graphics platform lets a local user gain higher privileges","description":"Heap-based buffer overflow in Windows Advanced Rasterization Platform allows an authorized attacker to elevate privileges locally.","summary":"A heap-based buffer overflow in the Windows Advanced Rasterization Platform lets an attacker who already has a local account raise their privileges. The sources do not describe a remote trigger.","severity":"high","cvss":8.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["infrastructure","windows"],"not_affected_if":["no-untrusted-local-users"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:19:41+00:00","first_seen_at":"2026-11-10T19:24:51+00:00","triaged_at":"2026-11-10T19:30:04+00:00","updated_at":"2026-11-10T19:30:04+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-11-10T19:30:04Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Windows: heap overflow in graphics platform lets a local user gain higher privileges","impact":"high","summary":"A heap-based buffer overflow in the Windows Advanced Rasterization Platform lets an attacker who already has a local account raise their privileges. The sources do not describe a remote trigger.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows"],"confidence":0.5,"fix_status":"unknown","needs_auth":"yes","worst_case":"local user gains elevated system privileges on the machine","analyst_note":"Check the Microsoft Security Update Guide entry for CVE-2026-118229 for affected Windows builds and the fixed update.","how_to_check":"unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["no-untrusted-local-users"],"who_is_affected":"Any Windows machine where a user already has a local account is in scope, since the flaw is triggered locally by an authorized user. The sources do not name affected Windows builds or whether a patch exists. Systems with no untrusted local users are lower risk.","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000665,"input_tokens":4502,"output_tokens":430,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Check the Microsoft Security Update Guide entry for CVE-2026-118229 for affected Windows builds and the fixed update.","search":"'-118229':16A,19A '-2026':15A,18A 'account':42B 'advanc':31B,61C 'allow':64C 'alreadi':38B 'attack':36B,67C 'author':66C 'base':25B,56C 'buffer':26B,57C 'cve':14A,17A 'describ':50B 'elev':69C 'gain':11A 'graphic':5A 'heap':2A,24B,55C 'heap-bas':23B,54C 'higher':12A 'infrastructur':20B 'let':7A,34B 'local':9A,41B,71C 'overflow':3A,27B,58C 'platform':6A,33B,63C 'privileg':13A,45B,70C 'rais':43B 'raster':32B,62C 'remot':52B 'sourc':47B 'trigger':53B 'user':10A 'window':1A,21B,30B,60C","nicknames":[],"mitigations":[],"who_affected":"Any Windows machine where a user already has a local account is in scope, since the flaw is triggered locally by an authorized user. The sources do not name affected Windows builds or whether a patch exists. Systems with no untrusted local users are lower risk.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["high","infrastructure","windows"],"campaign_type":null,"search_a":"'-118229':16A,19A '-2026':15A,18A 'cve':14A,17A 'gain':11A 'graphic':5A 'heap':2A 'higher':12A 'let':7A 'local':9A 'overflow':3A 'platform':6A 'privileg':13A 'user':10A 'window':1A","search_b":"'account':42B 'advanc':31B 'alreadi':38B 'attack':36B 'base':25B 'buffer':26B 'describ':50B 'heap':24B 'heap-bas':23B 'infrastructur':20B 'let':34B 'local':41B 'overflow':27B 'platform':33B 'privileg':45B 'rais':43B 'raster':32B 'remot':52B 'sourc':47B 'trigger':53B 'window':21B,30B","search_c":"'advanc':61C 'allow':64C 'attack':67C 'author':66C 'base':56C 'buffer':57C 'elev':69C 'heap':55C 'heap-bas':54C 'local':71C 'overflow':58C 'platform':63C 'privileg':70C 'raster':62C 'window':60C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:19:41+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-118229","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118229","severity":null,"published_at":"2026-11-10T19:19:41+00:00","modified_at":"2026-11-10T19:19:41+00:00","first_seen_at":"2026-11-10T19:24:51+00:00","fetched_at":"2026-11-10T19:24:51+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"}