{"id":"CVE-2019-1064","kind":"vulnerability","aliases":["CVE-2019-1064"],"related":[],"title":"Microsoft Windows: Microsoft Windows AppX Deployment Service (AppXSVC) Privilege Escalation Vulnerability","description":"An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links. An attacker who successfully exploited this vulnerability could run processes in an elevated context. An attacker could then install programs; view, change or delete data.\nTo exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control of an affected system.\nThe security update addresses the vulnerability by correcting how Windows AppX Deployment Service handles hard links.","summary":"Windows AppX Deployment Service (AppXSVC) mishandles hard links, letting a local user escalate privileges. An attacker who already has a foothold on the machine can run processes with elevated rights.","severity":"high","cvss":7.8,"epss":0.06886,"exploited":true,"exploited_at":"2022-03-15T00:00:00+00:00","products":[{"name":"Microsoft Windows","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","ransomware","windows"],"not_affected_if":["patched-windows"],"how_to_check":null,"fix":"Apply the Microsoft Windows update for CVE-2019-1064 per vendor instructions, as CISA requires.","status":"open","published_at":"2019-06-12T14:29:04+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:22:17+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T21:22:17Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft Windows update for CVE-2019-1064 per vendor instructions, as CISA requires.","reach":"local","impact":"high","summary":"Windows AppX Deployment Service (AppXSVC) mishandles hard links, letting a local user escalate privileges. An attacker who already has a foothold on the machine can run processes with elevated rights.","category":"infrastructure","who_cares":["windows"],"confidence":0.6,"needs_auth":"yes","worst_case":"local attacker gains elevated SYSTEM-level process execution on Windows","analyst_note":"Find the affected Windows builds and KB numbers at the Microsoft Security Response Center entry for CVE-2019-1064 and confirm the patch list; sources give no version details.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["patched-windows"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000455,"input_tokens":2861,"output_tokens":338,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-1064':14A,17A '-2019':13A,16A 'address':134C 'affect':129C 'alreadi':41B 'applic':118C 'appx':5A,25B,62C,141C 'appxsvc':8A,28B,65C 'attack':39B,71C,85C,100C,111C 'chang':91C 'context':83C 'control':126C 'correct':138C 'could':77C,86C,112C,120C 'craft':117C 'cve':12A,15A 'data':94C 'delet':93C 'deploy':6A,26B,63C,142C 'elev':52B,55C,82C 'escal':10A,36B 'exist':59C 'exploit':20B,74C,96C,121C 'first':102C 'foothold':44B 'handl':67C,144C 'hard':30B,68C,145C 'improp':66C 'infrastructur':21B 'instal':88C 'let':32B 'link':31B,69C,146C 'local':34B 'log':105C 'machin':47B 'microsoft':1A,3A,18A 'mishandl':29B 'privileg':9A,37B,57C 'process':50B,79C 'program':89C 'ransomwar':22B 'right':53B 'run':49B,78C,114C 'secur':132C 'servic':7A,27B,64C,143C 'special':116C 'success':73C 'system':109C,130C 'take':125C 'updat':133C 'user':35B 'view':90C 'vulner':11A,58C,76C,98C,123C,136C 'window':2A,4A,23B,24B,61C,140C 'windows':19A 'would':101C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2019-06-12T14:29:04+00:00","kev":{"dateAdded":"2022-03-15","dueDate":"2022-04-05","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Known"},"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":"kev","external_id":"CVE-2019-1064","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2019-1064","severity":null,"published_at":"2022-03-15T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T10:39:07+00:00","note":null},{"source":"epss","external_id":"CVE-2019-1064","url":"https://api.first.org/data/v1/epss?cve=CVE-2019-1064","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:44+00:00","fetched_at":"2026-10-23T19:13:44+00:00","note":null},{"source":"nvd","external_id":"CVE-2019-1064","url":"https://nvd.nist.gov/vuln/detail/CVE-2019-1064","severity":null,"published_at":"2019-06-12T14:29:04+00:00","modified_at":"2026-06-17T02:27:44+00:00","first_seen_at":"2026-10-23T21:57:35+00:00","fetched_at":"2026-10-23T21:57:35+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}