{"id":"CVE-2026-105493","kind":"vulnerability","aliases":["CVE-2026-105493"],"related":[],"title":"Windows: stack buffer overflow lets a signed-in user gain system rights","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 lets a local attacker who already has an account raise their privileges. The flaw is local only and the sources give no evidence of exploitation in the wild.","severity":"high","cvss":8.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["infrastructure","multi-user-systems","windows"],"not_affected_if":["no-local-accounts-untrusted"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:17:46+00:00","first_seen_at":"2026-11-10T19:24:14+00:00","triaged_at":"2026-11-10T19:34:12+00:00","updated_at":"2026-11-10T19:34:12+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-11-10T19:34:12Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Windows: stack buffer overflow lets a signed-in user gain system rights","impact":"high","summary":"A stack-based buffer overflow in the Windows Advanced Rasterization Platform lets a local attacker who already has an account raise their privileges. The flaw is local only and the sources give no evidence of exploitation in the wild.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows","multi-user-systems"],"confidence":0.6,"fix_status":"unknown","needs_auth":"yes","worst_case":"local user gains system-level privileges on the machine","analyst_note":"Find the Microsoft security update guide entry for CVE-2026-105493 to get affected Windows builds and the patch.","how_to_check":"- unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["no-local-accounts-untrusted"],"who_is_affected":"Any Windows machine running the Advanced Rasterization Platform component is in scope, since the flaw is in the Windows OS itself. An attacker needs a local account on the machine first, so shared hosts and multi-user systems carry the most exposure. The sources do not say which Windows builds are affected.","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000682,"input_tokens":4502,"output_tokens":464,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Find the Microsoft security update guide entry for CVE-2026-105493 to get affected Windows builds and the patch.","search":"'-105493':16A,19A '-2026':15A,18A 'account':46B 'advanc':35B,73C 'allow':76C 'alreadi':43B 'attack':41B,79C 'author':78C 'base':29B,68C 'buffer':3A,30B,69C 'cve':14A,17A 'elev':81C 'evid':60B 'exploit':62B 'flaw':51B 'gain':11A 'give':58B 'infrastructur':20B 'let':5A,38B 'local':40B,53B,83C 'multi':22B 'multi-user-system':21B 'overflow':4A,31B,70C 'platform':37B,75C 'privileg':49B,82C 'rais':47B 'raster':36B,74C 'right':13A 'sign':8A 'signed-in':7A 'sourc':57B 'stack':2A,28B,67C 'stack-bas':27B,66C 'system':12A,24B 'user':10A,23B 'wild':65B 'window':1A,25B,34B,72C","nicknames":[],"mitigations":[],"who_affected":"Any Windows machine running the Advanced Rasterization Platform component is in scope, since the flaw is in the Windows OS itself. An attacker needs a local account on the machine first, so shared hosts and multi-user systems carry the most exposure. 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":["high","infrastructure","multiusersystems","windows"],"campaign_type":null,"search_a":"'-105493':16A,19A '-2026':15A,18A 'buffer':3A 'cve':14A,17A 'gain':11A 'let':5A 'overflow':4A 'right':13A 'sign':8A 'signed-in':7A 'stack':2A 'system':12A 'user':10A 'window':1A","search_b":"'account':46B 'advanc':35B 'alreadi':43B 'attack':41B 'base':29B 'buffer':30B 'evid':60B 'exploit':62B 'flaw':51B 'give':58B 'infrastructur':20B 'let':38B 'local':40B,53B 'multi':22B 'multi-user-system':21B 'overflow':31B 'platform':37B 'privileg':49B 'rais':47B 'raster':36B 'sourc':57B 'stack':28B 'stack-bas':27B 'system':24B 'user':23B 'wild':65B 'window':25B,34B","search_c":"'advanc':73C 'allow':76C 'attack':79C 'author':78C 'base':68C 'buffer':69C 'elev':81C 'local':83C 'overflow':70C 'platform':75C 'privileg':82C 'raster':74C 'stack':67C 'stack-bas':66C 'window':72C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:17:46+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-2026-105493","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-105493","severity":null,"published_at":"2026-11-10T19:17:46+00:00","modified_at":"2026-11-10T19:17:47+00:00","first_seen_at":"2026-11-10T19:24:14+00:00","fetched_at":"2026-11-10T19:24:14+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"}