{"id":"CVE-2026-121671","kind":"vulnerability","aliases":["CVE-2026-121671"],"related":[],"title":"Windows Audio Service: use-after-free lets a local user gain privileges","description":"Use after free in Windows Audio Service allows an authorized attacker to elevate privileges locally.","summary":"A use-after-free bug in the Windows Audio Service lets an attacker who already has a local account raise their privileges. The sources do not say what versions are affected or what the fix is.","severity":"high","cvss":7.0,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"Windows Audio Service","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["infrastructure","windows"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:20:30+00:00","first_seen_at":"2026-11-10T19:25:09+00:00","triaged_at":"2026-11-10T19:50:16+00:00","updated_at":"2026-11-10T19:50:16+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-11-10T19:50:16Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Windows Audio Service: use-after-free lets a local user gain privileges","impact":"high","summary":"A use-after-free bug in the Windows Audio Service lets an attacker who already has a local account raise their privileges. The sources do not say what versions are affected or what the fix is.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows"],"confidence":0.5,"fix_status":"unknown","needs_auth":"yes","worst_case":"local user gains elevated system privileges on the machine","analyst_note":"Check the Microsoft Security Response Center entry for CVE-2026-121671 for affected builds and the patch.","how_to_check":"- unknown","plain_action":"","product_name":"Windows Audio Service","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Machines running the Windows Audio Service where a user already has a local account. The sources do not list affected Windows builds or say whether remote access is needed, so the scope is unknown.","user_interaction":"unknown","product_ecosystem":"vendor","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000653,"input_tokens":4478,"output_tokens":411,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Check the Microsoft Security Response Center entry for CVE-2026-121671 for affected builds and the patch.","search":"'-121671':16A,19A '-2026':15A,18A 'account':44B 'affect':56B 'allow':68C 'alreadi':40B 'attack':38B,71C 'audio':2A,21A,34B,66C 'author':70C 'bug':30B 'cve':14A,17A 'elev':73C 'fix':60B 'free':7A,29B,63C 'gain':12A 'infrastructur':23B 'let':8A,36B 'local':10A,43B,75C 'privileg':13A,47B,74C 'rais':45B 'say':52B 'servic':3A,35B,67C 'service':22A 'sourc':49B 'use':5A,27B,61C 'use-after-fre':4A,26B 'user':11A 'version':54B 'window':1A,24B,33B,65C 'windows':20A","nicknames":[],"mitigations":[],"who_affected":"Machines running the Windows Audio Service where a user already has a local account. The sources do not list affected Windows builds or say whether remote access is needed, so the scope is unknown.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":["audioservice","windowsaudioservice"],"ptokens":["audio","service","windows"],"labels":["high","infrastructure","vendor","windows"],"campaign_type":null,"search_a":"'-121671':16A,19A '-2026':15A,18A 'audio':2A,21A 'cve':14A,17A 'free':7A 'gain':12A 'let':8A 'local':10A 'privileg':13A 'servic':3A 'service':22A 'use':5A 'use-after-fre':4A 'user':11A 'window':1A 'windows':20A","search_b":"'account':44B 'affect':56B 'alreadi':40B 'attack':38B 'audio':34B 'bug':30B 'fix':60B 'free':29B 'infrastructur':23B 'let':36B 'local':43B 'privileg':47B 'rais':45B 'say':52B 'servic':35B 'sourc':49B 'use':27B 'use-after-fre':26B 'version':54B 'window':24B,33B","search_c":"'allow':68C 'attack':71C 'audio':66C 'author':70C 'elev':73C 'free':63C 'local':75C 'privileg':74C 'servic':67C 'use':61C 'window':65C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:20:30+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:H/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-2026-121671","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121671","severity":null,"published_at":"2026-11-10T19:20:30+00:00","modified_at":"2026-11-10T19:20:30+00:00","first_seen_at":"2026-11-10T19:25:09+00:00","fetched_at":"2026-11-10T19:25:09+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"}