{"id":"CVE-2026-105532","kind":"vulnerability","aliases":["CVE-2026-105532"],"related":[],"title":"Windows Installer: link following lets a local user gain higher privileges","description":"Improper link resolution before file access ('link following') in Windows Installer allows an authorized attacker to elevate privileges locally.","summary":"Windows Installer resolves a symbolic or file link before accessing a file, so an authorized local user can redirect that access. An attacker who already has a local account can use this to elevate privileges.","severity":"high","cvss":7.8,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"Windows Installer","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["infrastructure","windows","windows-installer"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:17:53+00:00","first_seen_at":"2026-11-10T19:24:18+00:00","triaged_at":"2026-11-10T19:42:34+00:00","updated_at":"2026-11-10T19:42:34+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-11-10T19:42:34Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Windows Installer: link following lets a local user gain higher privileges","impact":"high","summary":"Windows Installer resolves a symbolic or file link before accessing a file, so an authorized local user can redirect that access. An attacker who already has a local account can use this to elevate privileges.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows","windows-installer"],"confidence":0.5,"fix_status":"unknown","needs_auth":"yes","worst_case":"local user gains administrator or SYSTEM privileges on Windows","analyst_note":"Find the Microsoft advisory for CVE-2026-105532 to confirm affected Windows builds, fixed update and any mitigation.","how_to_check":"- unknown","plain_action":"","product_name":"Windows Installer","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"unknown","product_ecosystem":"vendor","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000637,"input_tokens":4489,"output_tokens":377,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Find the Microsoft advisory for CVE-2026-105532 to confirm affected Windows builds, fixed update and any mitigation.","search":"'-105532':14A,17A '-2026':13A,16A 'access':34B,45B,65C 'account':53B 'allow':71C 'alreadi':49B 'attack':47B,74C 'author':39B,73C 'cve':12A,15A 'elev':58B,76C 'file':31B,36B,64C 'follow':4A,67C 'gain':9A 'higher':10A 'improp':60C 'infrastructur':20B 'instal':2A,24B,26B,70C 'installer':19A 'let':5A 'link':3A,32B,61C,66C 'local':7A,40B,52B,78C 'privileg':11A,59B,77C 'redirect':43B 'resolut':62C 'resolv':27B 'symbol':29B 'use':55B 'user':8A,41B 'window':1A,21B,23B,25B,69C 'windows':18A 'windows-instal':22B","nicknames":[],"mitigations":[],"who_affected":null,"tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":["installer","windowsinstaller"],"ptokens":["installer","windows"],"labels":["high","infrastructure","vendor","windows","windowsinstaller"],"campaign_type":null,"search_a":"'-105532':14A,17A '-2026':13A,16A 'cve':12A,15A 'follow':4A 'gain':9A 'higher':10A 'instal':2A 'installer':19A 'let':5A 'link':3A 'local':7A 'privileg':11A 'user':8A 'window':1A 'windows':18A","search_b":"'access':34B,45B 'account':53B 'alreadi':49B 'attack':47B 'author':39B 'elev':58B 'file':31B,36B 'infrastructur':20B 'instal':24B,26B 'link':32B 'local':40B,52B 'privileg':59B 'redirect':43B 'resolv':27B 'symbol':29B 'use':55B 'user':41B 'window':21B,23B,25B 'windows-instal':22B","search_c":"'access':65C 'allow':71C 'attack':74C 'author':73C 'elev':76C 'file':64C 'follow':67C 'improp':60C 'instal':70C 'link':61C,66C 'local':78C 'privileg':77C 'resolut':62C 'window':69C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:17:53+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-2026-105532","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-105532","severity":null,"published_at":"2026-11-10T19:17:53+00:00","modified_at":"2026-11-10T19:17:53+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"}