{"id":"CVE-2026-118226","kind":"vulnerability","aliases":["CVE-2026-118226"],"related":[],"title":"Windows: stack buffer overflow lets a local user gain higher privileges","description":"Stack-based buffer overflow in Windows Advanced Rasterization Platform allows an authorized attacker to elevate privileges locally.","summary":"A stack-based buffer overflow in the Windows Advanced Rasterization Platform, a core graphics component, can be triggered by an authorized local user. A successful attack lets that user elevate their privileges on the machine.","severity":"high","cvss":8.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["infrastructure","windows"],"not_affected_if":["no-local-users"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:19:40+00:00","first_seen_at":"2026-11-10T19:24:51+00:00","triaged_at":"2026-11-10T19:30:07+00:00","updated_at":"2026-11-10T19:30:07+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-11-10T19:30:07Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Windows: stack buffer overflow lets a local user gain higher privileges","impact":"high","summary":"A stack-based buffer overflow in the Windows Advanced Rasterization Platform, a core graphics component, can be triggered by an authorized local user. A successful attack lets that user elevate their privileges on the machine.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows"],"confidence":0.6,"fix_status":"unknown","needs_auth":"yes","worst_case":"local user gains administrator or SYSTEM privileges on the machine","analyst_note":"Find the Microsoft security update guide entry for CVE-2026-118226 to list affected Windows builds and the fixed update.","how_to_check":"unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["no-local-users"],"who_is_affected":"Windows machines where a user already has a local account can be targeted; the attacker must already be logged in as an authorized user. The sources do not list affected Windows builds. unknown","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000656,"input_tokens":4502,"output_tokens":411,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Find the Microsoft security update guide entry for CVE-2026-118226 to list affected Windows builds and the fixed update.","search":"'-118226':14A,17A '-2026':13A,16A 'advanc':29B,63C 'allow':66C 'attack':46B,69C 'author':41B,68C 'base':23B,58C 'buffer':3A,24B,59C 'compon':35B 'core':33B 'cve':12A,15A 'elev':50B,71C 'gain':9A 'graphic':34B 'higher':10A 'infrastructur':18B 'let':5A,47B 'local':7A,42B,73C 'machin':55B 'overflow':4A,25B,60C 'platform':31B,65C 'privileg':11A,52B,72C 'raster':30B,64C 'stack':2A,22B,57C 'stack-bas':21B,56C 'success':45B 'trigger':38B 'user':8A,43B,49B 'window':1A,19B,28B,62C","nicknames":[],"mitigations":[],"who_affected":"Windows machines where a user already has a local account can be targeted; the attacker must already be logged in as an authorized user. The sources do not list affected Windows builds. unknown","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":"'-118226':14A,17A '-2026':13A,16A 'buffer':3A 'cve':12A,15A 'gain':9A 'higher':10A 'let':5A 'local':7A 'overflow':4A 'privileg':11A 'stack':2A 'user':8A 'window':1A","search_b":"'advanc':29B 'attack':46B 'author':41B 'base':23B 'buffer':24B 'compon':35B 'core':33B 'elev':50B 'graphic':34B 'infrastructur':18B 'let':47B 'local':42B 'machin':55B 'overflow':25B 'platform':31B 'privileg':52B 'raster':30B 'stack':22B 'stack-bas':21B 'success':45B 'trigger':38B 'user':43B,49B 'window':19B,28B","search_c":"'advanc':63C 'allow':66C 'attack':69C 'author':68C 'base':58C 'buffer':59C 'elev':71C 'local':73C 'overflow':60C 'platform':65C 'privileg':72C 'raster':64C 'stack':57C 'stack-bas':56C 'window':62C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:19:40+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-2026-118226","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118226","severity":null,"published_at":"2026-11-10T19:19:40+00:00","modified_at":"2026-11-10T19:19:40+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"}