{"id":"CVE-2026-119387","kind":"vulnerability","aliases":["CVE-2026-119387"],"related":[],"title":"Windows QWAVE service use-after-free lets local users gain elevated privileges","description":"Use after free in Quality Windows Audio/Video Experience (QWAVE) service allows an authorized attacker to elevate privileges locally.","summary":"A use-after-free bug in the Windows Quality Windows Audio/Video Experience (QWAVE) service lets an authorized local attacker elevate privileges. An attacker who already has a low-privilege account on the machine can gain higher system rights.","severity":"high","cvss":7.0,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["infrastructure","qwave","windows"],"not_affected_if":["no-local-untrusted-users"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:19:52+00:00","first_seen_at":"2026-11-10T19:24:56+00:00","triaged_at":"2026-11-10T19:52:02+00:00","updated_at":"2026-11-10T19:52:02+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-11-10T19:52:02Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Windows QWAVE service use-after-free lets local users gain elevated privileges","impact":"high","summary":"A use-after-free bug in the Windows Quality Windows Audio/Video Experience (QWAVE) service lets an authorized local attacker elevate privileges. An attacker who already has a low-privilege account on the machine can gain higher system rights.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows","qwave"],"confidence":0.5,"fix_status":"unknown","needs_auth":"yes","worst_case":"local user gains system-level privileges on the machine","analyst_note":"Check the NVD entry and the Microsoft Security Update Guide for affected Windows builds, the fixed update, and whether QWAVE runs by default.","how_to_check":"unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["no-local-untrusted-users"],"who_is_affected":"Only Windows machines where the QWAVE service is present and an attacker already has a local account. The sources do not say which Windows builds are affected or whether the service runs by default. Systems with no untrusted local users carry less risk.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000675,"input_tokens":4504,"output_tokens":449,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Check the NVD entry and the Microsoft Security Update Guide for affected Windows builds, the fixed update, and whether QWAVE runs by default.","search":"'-119387':16A,19A '-2026':15A,18A 'account':54B 'allow':73C 'alreadi':48B 'attack':42B,46B,76C 'audio/video':34B,69C 'author':40B,75C 'bug':28B 'cve':14A,17A 'elev':12A,43B,78C 'experi':35B,70C 'free':7A,27B,65C 'gain':11A,59B 'higher':60B 'infrastructur':20B 'let':8A,38B 'local':9A,41B,80C 'low':52B 'low-privileg':51B 'machin':57B 'privileg':13A,44B,53B,79C 'qualiti':32B,67C 'qwave':2A,21B,36B,71C 'right':62B 'servic':3A,37B,72C 'system':61B 'use':5A,25B,63C 'use-after-fre':4A,24B 'user':10A 'window':1A,22B,31B,33B,68C","nicknames":[],"mitigations":[],"who_affected":"Only Windows machines where the QWAVE service is present and an attacker already has a local account. The sources do not say which Windows builds are affected or whether the service runs by default. Systems with no untrusted local users carry less risk.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["high","infrastructure","qwave","windows"],"campaign_type":null,"search_a":"'-119387':16A,19A '-2026':15A,18A 'cve':14A,17A 'elev':12A 'free':7A 'gain':11A 'let':8A 'local':9A 'privileg':13A 'qwave':2A 'servic':3A 'use':5A 'use-after-fre':4A 'user':10A 'window':1A","search_b":"'account':54B 'alreadi':48B 'attack':42B,46B 'audio/video':34B 'author':40B 'bug':28B 'elev':43B 'experi':35B 'free':27B 'gain':59B 'higher':60B 'infrastructur':20B 'let':38B 'local':41B 'low':52B 'low-privileg':51B 'machin':57B 'privileg':44B,53B 'qualiti':32B 'qwave':21B,36B 'right':62B 'servic':37B 'system':61B 'use':25B 'use-after-fre':24B 'window':22B,31B,33B","search_c":"'allow':73C 'attack':76C 'audio/video':69C 'author':75C 'elev':78C 'experi':70C 'free':65C 'local':80C 'privileg':79C 'qualiti':67C 'qwave':71C 'servic':72C 'use':63C 'window':68C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:19:52+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-2026-119387","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119387","severity":null,"published_at":"2026-11-10T19:19:52+00:00","modified_at":"2026-11-10T19:19:52+00:00","first_seen_at":"2026-11-10T19:24:56+00:00","fetched_at":"2026-11-10T19:24:56+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"}