{"id":"CVE-2026-119886","kind":"vulnerability","aliases":["CVE-2026-119886"],"related":[],"title":"Windows Telephony Service: missing authentication lets a local user gain higher privileges","description":"Missing authentication for critical function in Windows Telephony Service allows an authorized attacker to elevate privileges locally.","summary":"The Windows Telephony Service exposes a critical function without an authentication check. An attacker who already has a low-privilege account on the machine can use it to elevate their privileges.","severity":"high","cvss":7.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["infrastructure","windows"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:20:08+00:00","first_seen_at":"2026-11-10T19:25:01+00:00","triaged_at":"2026-11-10T19:40:21+00:00","updated_at":"2026-11-10T19:40:21+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-11-10T19:40:21Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Windows Telephony Service: missing authentication lets a local user gain higher privileges","impact":"high","summary":"The Windows Telephony Service exposes a critical function without an authentication check. An attacker who already has a low-privilege account on the machine can use it to elevate their privileges.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows"],"confidence":0.6,"fix_status":"unknown","needs_auth":"yes","worst_case":"local user gains administrator or SYSTEM privileges on the machine","analyst_note":"Check the Microsoft Security Update Guide entry for CVE-2026-119886 for affected Windows builds, the patch KB, and whether a default-config exposure exists.","how_to_check":"unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Affects Windows machines running the Telephony Service, where a user already has a local account. Exposure requires a local foothold; the sources do not list affected Windows builds or whether the service is disabled by default.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000656,"input_tokens":4488,"output_tokens":415,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Check the Microsoft Security Update Guide entry for CVE-2026-119886 for affected Windows builds, the patch KB, and whether a default-config exposure exists.","search":"'-119886':15A,18A '-2026':14A,17A 'account':42B 'allow':62C 'alreadi':36B 'attack':34B,65C 'authent':5A,31B,54C 'author':64C 'check':32B 'critic':27B,56C 'cve':13A,16A 'elev':50B,67C 'expos':25B 'function':28B,57C 'gain':10A 'higher':11A 'infrastructur':19B 'let':6A 'local':8A,69C 'low':40B 'low-privileg':39B 'machin':45B 'miss':4A,53C 'privileg':12A,41B,52B,68C 'servic':3A,24B,61C 'telephoni':2A,23B,60C 'use':47B 'user':9A 'window':1A,20B,22B,59C 'without':29B","nicknames":[],"mitigations":[],"who_affected":"Affects Windows machines running the Telephony Service, where a user already has a local account. Exposure requires a local foothold; the sources do not list affected Windows builds or whether the service is disabled by default.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["high","infrastructure","windows"],"campaign_type":null,"search_a":"'-119886':15A,18A '-2026':14A,17A 'authent':5A 'cve':13A,16A 'gain':10A 'higher':11A 'let':6A 'local':8A 'miss':4A 'privileg':12A 'servic':3A 'telephoni':2A 'user':9A 'window':1A","search_b":"'account':42B 'alreadi':36B 'attack':34B 'authent':31B 'check':32B 'critic':27B 'elev':50B 'expos':25B 'function':28B 'infrastructur':19B 'low':40B 'low-privileg':39B 'machin':45B 'privileg':41B,52B 'servic':24B 'telephoni':23B 'use':47B 'window':20B,22B 'without':29B","search_c":"'allow':62C 'attack':65C 'authent':54C 'author':64C 'critic':56C 'elev':67C 'function':57C 'local':69C 'miss':53C 'privileg':68C 'servic':61C 'telephoni':60C 'window':59C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:20:08+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-2026-119886","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119886","severity":null,"published_at":"2026-11-10T19:20:08+00:00","modified_at":"2026-11-10T19:20:08+00:00","first_seen_at":"2026-11-10T19:25:01+00:00","fetched_at":"2026-11-10T19:25:01+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"}