{"id":"CVE-2026-119887","kind":"vulnerability","aliases":["CVE-2026-119887"],"related":[],"title":"Windows Installer: uninitialized memory lets an attacker read data over a network","description":"Use of uninitialized resource in Windows Installer allows an unauthorized attacker to disclose information over a network.","summary":"Windows Installer reads a resource that was never initialized, which can leak memory contents. An unauthorized attacker on the network can read that disclosed information.","severity":"medium","cvss":6.5,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["infrastructure","windows","windows-installer"],"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":"2026-11-10T19:56:26+00:00","updated_at":"2026-11-10T19:56:26+00:00","category":"infrastructure","confidence":0.4,"triage":{"at":"2026-11-10T19:56:26Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Windows Installer: uninitialized memory lets an attacker read data over a network","impact":"low","summary":"Windows Installer reads a resource that was never initialized, which can leak memory contents. An unauthorized attacker on the network can read that disclosed information.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows","windows-installer"],"confidence":0.4,"fix_status":"unknown","needs_auth":"no","worst_case":"Sensitive memory contents disclosed to a remote unauthorized attacker","analyst_note":"Check the Microsoft security update guide entry for CVE-2026-119887 for affected Windows builds, the fixed update, and whether a patch is available.","how_to_check":"unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Windows machines that run the Windows Installer service are in scope per the description; the sources do not name affected builds or configurations. unknown","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000644,"input_tokens":4489,"output_tokens":390,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-119887':15A,18A '-2026':14A,17A 'allow':56C 'attack':7A,40B,59C 'content':37B 'cve':13A,16A 'data':9A 'disclos':47B,61C 'inform':48B,62C 'infrastructur':19B 'initi':32B 'instal':2A,23B,25B,55C 'leak':35B 'let':5A 'memori':4A,36B 'network':12A,43B,65C 'never':31B 'read':8A,26B,45B 'resourc':28B,52C 'unauthor':39B,58C 'uniniti':3A,51C 'use':49C 'window':1A,20B,22B,24B,54C 'windows-instal':21B","nicknames":[],"mitigations":[],"who_affected":"Windows machines that run the Windows Installer service are in scope per the description; the sources do not name affected builds or configurations. unknown","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["infrastructure","medium","windows","windowsinstaller"],"campaign_type":null,"search_a":"'-119887':15A,18A '-2026':14A,17A 'attack':7A 'cve':13A,16A 'data':9A 'instal':2A 'let':5A 'memori':4A 'network':12A 'read':8A 'uniniti':3A 'window':1A","search_b":"'attack':40B 'content':37B 'disclos':47B 'inform':48B 'infrastructur':19B 'initi':32B 'instal':23B,25B 'leak':35B 'memori':36B 'network':43B 'never':31B 'read':26B,45B 'resourc':28B 'unauthor':39B 'window':20B,22B,24B 'windows-instal':21B","search_c":"'allow':56C 'attack':59C 'disclos':61C 'inform':62C 'instal':55C 'network':65C 'resourc':52C 'unauthor':58C 'uniniti':51C 'use':49C 'window':54C","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:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-119887","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119887","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"}