{"id":"CVE-2026-118278","kind":"vulnerability","aliases":["CVE-2026-118278"],"related":[],"title":"Windows: out-of-bounds read lets a local user gain higher privileges","description":"Out-of-bounds read in Windows Advanced Rasterization Platform allows an authorized attacker to elevate privileges locally.","summary":"Windows Advanced Rasterization Platform, a graphics component of Windows, has an out-of-bounds read flaw. An attacker who already has a local account can elevate privileges on the machine.","severity":"high","cvss":8.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["graphics","infrastructure","local-privilege-escalation","windows"],"not_affected_if":[],"how_to_check":"Unknown: affected builds not read from Microsoft. Open the Security Update Guide entry for CVE-2026-118278, find your Windows version, and compare it with the KB listed. Check with Get-HotFix or winver.","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":"2026-11-10T19:30:00+00:00","updated_at":"2026-11-10T23:17:01+00:00","category":"infrastructure","confidence":0.4,"triage":{"at":"2026-11-10T19:30:00Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Windows: out-of-bounds read lets a local user gain higher privileges","impact":"high","summary":"Windows Advanced Rasterization Platform, a graphics component of Windows, has an out-of-bounds read flaw. An attacker who already has a local account can elevate 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 higher privileges on the machine","analyst_note":"Find the Microsoft security update guide entry for CVE-2026-118278 to get affected and fixed Windows builds.","how_to_check":"unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Affects Windows machines where a user already has a local account; the sources do not name affected builds or the exact configuration. Exposure depends on who can log on locally. unknown","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000643,"input_tokens":4501,"output_tokens":386,"severity_before":"high"},"analyst_status":"done","analyst_note":"Find the Microsoft security update guide entry for CVE-2026-118278 to get affected and fixed Windows builds.","search":"'-118278':16A,19A '-2026':15A,18A 'account':51B 'advanc':28B,65C 'allow':68C 'alreadi':47B 'attack':45B,71C 'author':70C 'bound':5A,41B,61C 'compon':33B 'cve':14A,17A 'elev':53B,73C 'escal':25B 'flaw':43B 'gain':11A 'graphic':20B,32B 'higher':12A 'infrastructur':21B 'let':7A 'local':9A,23B,50B,75C 'local-privilege-escal':22B 'machin':57B 'out-of-bound':2A,38B,58C 'platform':30B,67C 'privileg':13A,24B,54B,74C 'raster':29B,66C 'read':6A,42B,62C 'user':10A 'window':1A,26B,27B,35B,64C","nicknames":[],"mitigations":[],"who_affected":"Windows machines where someone can log on locally with a low-privilege account (shared workstations, RDP or terminal servers, build or VDI hosts). Microsoft's builds are not confirmed yet. Single-user machines with no untrusted local code have less exposure.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"unknown","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["graphics","high","infrastructure","localprivilegeescalation","windows"],"campaign_type":null,"search_a":"'-118278':16A,19A '-2026':15A,18A 'bound':5A 'cve':14A,17A 'gain':11A 'higher':12A 'let':7A 'local':9A 'out-of-bound':2A 'privileg':13A 'read':6A 'user':10A 'window':1A","search_b":"'account':51B 'advanc':28B 'alreadi':47B 'attack':45B 'bound':41B 'compon':33B 'elev':53B 'escal':25B 'flaw':43B 'graphic':20B,32B 'infrastructur':21B 'local':23B,50B 'local-privilege-escal':22B 'machin':57B 'out-of-bound':38B 'platform':30B 'privileg':24B,54B 'raster':29B 'read':42B 'window':26B,27B,35B","search_c":"'advanc':65C 'allow':68C 'attack':71C 'author':70C 'bound':61C 'elev':73C 'local':75C 'out-of-bound':58C 'platform':67C 'privileg':74C 'raster':66C 'read':62C 'window':64C","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-2026-118278","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118278","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},{"source":"analyst","external_id":"CVE-2026-118278:3132","url":null,"severity":null,"published_at":"2026-11-10T23:17:01+00:00","modified_at":"2026-11-10T23:17:01+00:00","first_seen_at":"2026-11-10T23:17:01+00:00","fetched_at":"2026-11-10T23:17:01+00:00","note":"MSRC update guide is JS-only (web-cli and WebFetch returned no content), CVRF API too large or empty, NVD page empty. No affected or fixed builds read, so nothing verified. Revisit with browser-cli or the MSRC monthly release notes. X and search not used."}],"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"}