{"id":"CVE-2026-118222","kind":"vulnerability","aliases":["CVE-2026-118222"],"related":[],"title":"Windows graphics platform heap overflow 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, the graphics component of Windows, lets an attacker who already has a logged-in account raise their privileges on the machine. The sources give a CVSS score of 7.8 (high) and state no known exploitation.","severity":"high","cvss":7.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["graphics","infrastructure","local-privilege-escalation","windows"],"not_affected_if":["no-local-users","patched-windows"],"how_to_check":"- Check the Windows build with `winver` and compare it against Microsoft's security update for CVE-2026-118222 (unknown from the sources)\n- Run `Get-HotFix` in PowerShell to list installed security updates (unknown from the sources)","fix":null,"status":"open","published_at":"2026-11-10T19:19:39+00:00","first_seen_at":"2026-11-10T19:24:50+00:00","triaged_at":"2026-11-10T19:40:47+00:00","updated_at":"2026-11-10T23:19:08+00:00","category":"infrastructure","confidence":0.4,"triage":{"at":"2026-11-10T19:40:47Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Windows graphics platform heap overflow lets a local user gain higher privileges","impact":"high","summary":"A heap-based buffer overflow in the Windows Advanced Rasterization Platform, the graphics component of Windows, lets an attacker who already has a logged-in account raise their privileges on the machine. The sources give a CVSS score of 7.8 (high) and state no known exploitation.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows"],"confidence":0.6,"fix_status":"unknown","needs_auth":"yes","worst_case":"local user gains elevated system privileges on Windows","analyst_note":"Find the affected Windows builds and Microsoft's fixed update for CVE-2026-118222 at the MSRC advisory page.","how_to_check":"- Check the Windows build with `winver` and compare it against Microsoft's security update for CVE-2026-118222 (unknown from the sources)\n- Run `Get-HotFix` in PowerShell to list installed security updates (unknown from the sources)","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["no-local-users","patched-windows"],"who_is_affected":"Any Windows machine with the affected Advanced Rasterization Platform component is exposed to a local user who is already authorized on it. The sources do not name affected Windows versions or the patch. Systems where only trusted administrators log on carry less practical risk.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000722,"input_tokens":4502,"output_tokens":543,"severity_before":"high"},"analyst_status":"done","analyst_note":"Find the affected Windows builds and Microsoft's fixed update for CVE-2026-118222 at the MSRC advisory page.","search":"'-118222':15A,18A '-2026':14A,17A '7.8':67B 'account':53B 'advanc':35B,81C 'allow':84C 'alreadi':47B 'attack':45B,87C 'author':86C 'base':29B,76C 'buffer':30B,77C 'compon':40B 'cve':13A,16A 'cvss':64B 'elev':89C 'escal':24B 'exploit':73B 'gain':10A 'give':62B 'graphic':2A,19B,39B 'heap':4A,28B,75C 'heap-bas':27B,74C 'high':68B 'higher':11A 'infrastructur':20B 'known':72B 'let':6A,43B 'local':8A,22B,91C 'local-privilege-escal':21B 'log':51B 'logged-in':50B 'machin':59B 'overflow':5A,31B,78C 'platform':3A,37B,83C 'privileg':12A,23B,56B,90C 'rais':54B 'raster':36B,82C 'score':65B 'sourc':61B 'state':70B 'user':9A 'window':1A,25B,34B,42B,80C","nicknames":[],"mitigations":[],"who_affected":"Any Windows machine with the affected Advanced Rasterization Platform component is exposed to a local user who is already authorized on it. The sources do not name affected Windows versions or the patch. Systems where only trusted administrators log on carry less practical risk.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["graphics","high","infrastructure","localprivilegeescalation","windows"],"campaign_type":null,"search_a":"'-118222':15A,18A '-2026':14A,17A 'cve':13A,16A 'gain':10A 'graphic':2A 'heap':4A 'higher':11A 'let':6A 'local':8A 'overflow':5A 'platform':3A 'privileg':12A 'user':9A 'window':1A","search_b":"'7.8':67B 'account':53B 'advanc':35B 'alreadi':47B 'attack':45B 'base':29B 'buffer':30B 'compon':40B 'cvss':64B 'escal':24B 'exploit':73B 'give':62B 'graphic':19B,39B 'heap':28B 'heap-bas':27B 'high':68B 'infrastructur':20B 'known':72B 'let':43B 'local':22B 'local-privilege-escal':21B 'log':51B 'logged-in':50B 'machin':59B 'overflow':31B 'platform':37B 'privileg':23B,56B 'rais':54B 'raster':36B 'score':65B 'sourc':61B 'state':70B 'window':25B,34B,42B","search_c":"'advanc':81C 'allow':84C 'attack':87C 'author':86C 'base':76C 'buffer':77C 'elev':89C 'heap':75C 'heap-bas':74C 'local':91C 'overflow':78C 'platform':83C 'privileg':90C 'raster':82C 'window':80C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:19:39+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:L/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-2026-118222","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118222","severity":null,"published_at":"2026-11-10T19:19:39+00:00","modified_at":"2026-11-10T19:19:39+00:00","first_seen_at":"2026-11-10T19:24:50+00:00","fetched_at":"2026-11-10T19:24:50+00:00","note":null},{"source":"analyst","external_id":"CVE-2026-118222:3143","url":null,"severity":null,"published_at":"2026-11-10T23:19:08+00:00","modified_at":"2026-11-10T23:19:08+00:00","first_seen_at":"2026-11-10T23:19:08+00:00","fetched_at":"2026-11-10T23:19:08+00:00","note":"MSRC page is JS-only and returned nothing via web-cli; builds and KB numbers not read from a primary source. Only NVD/Rapid7 description (CVSS 3.1 7.8, AV:L/PR:L, not in KEV) confirmed. Nothing verified. Revisit with MSRC Update Guide text or the November 2026 Patch Tuesday release notes."}],"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"}