{"id":"CVE-2026-105526","kind":"vulnerability","aliases":["CVE-2026-105526"],"related":[],"title":"Windows Winsock: double free lets a local user gain higher privileges","description":"Double free in Winsock allows an authorized attacker to elevate privileges locally.","summary":"Winsock, the Windows networking component, contains a double free bug that an authorized local user can trigger. An attacker who can already run code on the machine can use it to elevate privileges.","severity":"high","cvss":7.0,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["infrastructure","windows","winsock"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:17:51+00:00","first_seen_at":"2026-11-10T19:24:18+00:00","triaged_at":"2026-11-10T19:54:10+00:00","updated_at":"2026-11-10T19:54:10+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-11-10T19:54:10Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Windows Winsock: double free lets a local user gain higher privileges","impact":"high","summary":"Winsock, the Windows networking component, contains a double free bug that an authorized local user can trigger. An attacker who can already run code on the machine can use it to elevate privileges.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows","winsock"],"confidence":0.5,"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 for CVE-2026-105526 for affected Windows builds, fixed updates and any mitigation.","how_to_check":"- unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Affects Windows systems where a user already has a local account and can run code. The sources do not name affected Windows builds or whether a patch exists. Systems where only trusted administrators log in are lower risk.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.00065,"input_tokens":4468,"output_tokens":407,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Check the Microsoft Security Update Guide for CVE-2026-105526 for affected Windows builds, fixed updates and any mitigation.","search":"'-105526':14A,17A '-2026':13A,16A 'allow':58C 'alreadi':42B 'attack':39B,61C 'author':33B,60C 'bug':30B 'code':44B 'compon':25B 'contain':26B 'cve':12A,15A 'doubl':3A,28B,54C 'elev':52B,63C 'free':4A,29B,55C 'gain':9A 'higher':10A 'infrastructur':18B 'let':5A 'local':7A,34B,65C 'machin':47B 'network':24B 'privileg':11A,53B,64C 'run':43B 'trigger':37B 'use':49B 'user':8A,35B 'window':1A,19B,23B 'winsock':2A,20B,21B,57C","nicknames":[],"mitigations":[],"who_affected":"Affects Windows systems where a user already has a local account and can run code. The sources do not name affected Windows builds or whether a patch exists. Systems where only trusted administrators log in are lower risk.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["high","infrastructure","windows","winsock"],"campaign_type":null,"search_a":"'-105526':14A,17A '-2026':13A,16A 'cve':12A,15A 'doubl':3A 'free':4A 'gain':9A 'higher':10A 'let':5A 'local':7A 'privileg':11A 'user':8A 'window':1A 'winsock':2A","search_b":"'alreadi':42B 'attack':39B 'author':33B 'bug':30B 'code':44B 'compon':25B 'contain':26B 'doubl':28B 'elev':52B 'free':29B 'infrastructur':18B 'local':34B 'machin':47B 'network':24B 'privileg':53B 'run':43B 'trigger':37B 'use':49B 'user':35B 'window':19B,23B 'winsock':20B,21B","search_c":"'allow':58C 'attack':61C 'author':60C 'doubl':54C 'elev':63C 'free':55C 'local':65C 'privileg':64C 'winsock':57C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:17:51+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-2026-105526","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-105526","severity":null,"published_at":"2026-11-10T19:17:51+00:00","modified_at":"2026-11-10T19:17:52+00:00","first_seen_at":"2026-11-10T19:24:18+00:00","fetched_at":"2026-11-10T19:24:18+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"}