{"id":"CVE-2026-96126","kind":"vulnerability","aliases":["CVE-2026-96126"],"related":[],"title":"Windows Graphics Kernel: heap overflow lets a local user gain system privileges","description":"Heap-based buffer overflow in Windows Graphics Kernel allows an authorized attacker to elevate privileges locally.","summary":"A heap-based buffer overflow in the Windows Graphics Kernel lets an attacker who already has a local account raise their privileges. The sources give no further detail on the trigger or the affected Windows builds.","severity":"high","cvss":7.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["endpoints","infrastructure","windows"],"not_affected_if":[],"how_to_check":"- Run winver (or: Get-ComputerInfo OsBuildNumber) and compare the build with the KB listed for CVE-2026-96126 in Microsoft's Security Update Guide (https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96126); installing the November 2026 Patch Tuesday cumulative update is the likely fix, but the exact KB and build are not confirmed here.","fix":null,"status":"open","published_at":"2026-11-10T19:22:10+00:00","first_seen_at":"2026-11-10T19:25:31+00:00","triaged_at":"2026-11-10T19:36:28+00:00","updated_at":"2026-11-10T19:47:04+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-11-10T19:36:28Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Windows Graphics Kernel: heap overflow lets a local user gain system privileges","impact":"high","summary":"A heap-based buffer overflow in the Windows Graphics Kernel lets an attacker who already has a local account raise their privileges. The sources give no further detail on the trigger or the affected Windows builds.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows","endpoints"],"confidence":0.5,"fix_status":"unknown","needs_auth":"yes","worst_case":"local attacker gains system-level privileges on the machine","analyst_note":"Find the Microsoft security update guide entry for CVE-2026-96126 to confirm affected builds and the patch.","how_to_check":"- Check the Windows build with `winver` and compare it to the patch list in Microsoft's security update guide for CVE-2026-96126\n- unknown beyond that, the sources do not say","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Any Windows machine where an untrusted or low-privilege user can log on or run code is a candidate for exposure. The sources do not list affected Windows builds. unknown whether non-default configuration matters.","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000685,"input_tokens":4498,"output_tokens":470,"severity_before":"high"},"analyst_status":"done","analyst_note":"Find the Microsoft security update guide entry for CVE-2026-96126 to confirm affected builds and the patch.","search":"'-2026':14A,17A '-96126':15A,18A 'account':41B 'affect':56B 'allow':68C 'alreadi':37B 'attack':35B,71C 'author':70C 'base':25B,61C 'buffer':26B,62C 'build':58B 'cve':13A,16A 'detail':50B 'elev':73C 'endpoint':19B 'gain':10A 'give':47B 'graphic':2A,31B,66C 'heap':4A,24B,60C 'heap-bas':23B,59C 'infrastructur':20B 'kernel':3A,32B,67C 'let':6A,33B 'local':8A,40B,75C 'overflow':5A,27B,63C 'privileg':12A,44B,74C 'rais':42B 'sourc':46B 'system':11A 'trigger':53B 'user':9A 'window':1A,21B,30B,57B,65C","nicknames":[],"mitigations":[],"who_affected":"Any Windows machine where an untrusted or low-privilege user can log on or run code is a candidate for exposure. The sources do not list affected Windows builds. unknown whether non-default configuration matters.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"unknown","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["endpoints","high","infrastructure","windows"],"campaign_type":null,"search_a":"'-2026':14A,17A '-96126':15A,18A 'cve':13A,16A 'gain':10A 'graphic':2A 'heap':4A 'kernel':3A 'let':6A 'local':8A 'overflow':5A 'privileg':12A 'system':11A 'user':9A 'window':1A","search_b":"'account':41B 'affect':56B 'alreadi':37B 'attack':35B 'base':25B 'buffer':26B 'build':58B 'detail':50B 'endpoint':19B 'give':47B 'graphic':31B 'heap':24B 'heap-bas':23B 'infrastructur':20B 'kernel':32B 'let':33B 'local':40B 'overflow':27B 'privileg':44B 'rais':42B 'sourc':46B 'trigger':53B 'window':21B,30B,57B","search_c":"'allow':68C 'attack':71C 'author':70C 'base':61C 'buffer':62C 'elev':73C 'graphic':66C 'heap':60C 'heap-bas':59C 'kernel':67C 'local':75C 'overflow':63C 'privileg':74C 'window':65C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:22:10+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-2026-96126","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-96126","severity":null,"published_at":"2026-11-10T19:22:10+00:00","modified_at":"2026-11-10T19:22:10+00:00","first_seen_at":"2026-11-10T19:25:31+00:00","fetched_at":"2026-11-10T19:25:31+00:00","note":null},{"source":"analyst","external_id":"CVE-2026-96126:2549","url":null,"severity":null,"published_at":"2026-11-10T19:47:04+00:00","modified_at":"2026-11-10T19:47:04+00:00","first_seen_at":"2026-11-10T19:47:04+00:00","fetched_at":"2026-11-10T19:47:04+00:00","note":"Could not read MSRC entry: update-guide page is JS-only (WebFetch returned nothing), CVRF 2026-Nov doc exceeds 10 MB fetch limit. No affected builds, KBs or fixed versions confirmed; nothing verified. Search/X not tried. Revisit with a browser-cli read of the MSRC page or the CVRF doc saved to disk."}],"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"}