{"id":"CVE-2019-1385","kind":"vulnerability","aliases":["CVE-2019-1385"],"related":[],"title":"Microsoft Windows: Microsoft Windows AppX Deployment Extensions Privilege Escalation Vulnerability","description":"An elevation of privilege vulnerability exists when the Windows AppX Deployment Extensions improperly performs privilege management, resulting in access to system files.To exploit this vulnerability, an authenticated attacker would need to run a specially crafted application to elevate privileges.The security update addresses the vulnerability by correcting how AppX Deployment Extensions manages privileges., aka 'Windows AppX Deployment Extensions Elevation of Privilege Vulnerability'.","summary":"A Windows AppX Deployment Extensions flaw improperly manages privileges, letting a local user reach protected system files. An attacker with a foothold on the machine can gain higher privileges.","severity":"high","cvss":7.8,"epss":0.03604,"exploited":true,"exploited_at":"2022-05-23T00:00:00+00:00","products":[{"name":"Microsoft Windows","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","microsoft-windows","ransomware","windows"],"not_affected_if":["patched-windows"],"how_to_check":null,"fix":"Apply the Microsoft Windows security update for CVE-2019-1385 per vendor instructions (CISA required action); the sources do not name the KB or build.","status":"open","published_at":"2019-11-12T19:15:12+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:17:35+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T21:17:35Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft Windows security update for CVE-2019-1385 per vendor instructions (CISA required action); the sources do not name the KB or build.\nunknown","reach":"local","impact":"high","summary":"A Windows AppX Deployment Extensions flaw improperly manages privileges, letting a local user reach protected system files. An attacker with a foothold on the machine can gain higher privileges.","category":"infrastructure","who_cares":["windows","microsoft-windows"],"confidence":0.6,"needs_auth":"yes","worst_case":"local user gains elevated privileges and reads protected system files","analyst_note":"Confirm affected Windows builds and the patch KB from the Microsoft Security Update Guide entry for CVE-2019-1385; the CISA KEV entry lists ransomware use.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["patched-windows"],"user_interaction":"no","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.00046,"input_tokens":2843,"output_tokens":352,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-1385':13A,16A '-2019':12A,15A 'access':73C 'address':96C 'aka':107C 'applic':90C 'appx':5A,28B,64C,102C,109C 'attack':44B,82C 'authent':81C 'correct':100C 'craft':89C 'cve':11A,14A 'deploy':6A,29B,65C,103C,110C 'elev':56C,92C,112C 'escal':9A 'exist':60C 'exploit':19B,77C 'extens':7A,30B,66C,104C,111C 'file':42B 'files.to':76C 'flaw':31B 'foothold':47B 'gain':52B 'higher':53B 'improp':32B,67C 'infrastructur':20B 'let':35B 'local':37B 'machin':50B 'manag':33B,70C,105C 'microsoft':1A,3A,17A,22B 'microsoft-window':21B 'need':84C 'perform':68C 'privileg':8A,34B,54B,58C,69C,106C,114C 'privileges.the':93C 'protect':40B 'ransomwar':24B 'reach':39B 'result':71C 'run':86C 'secur':94C 'special':88C 'system':41B,75C 'updat':95C 'user':38B 'vulner':10A,59C,79C,98C,115C 'window':2A,4A,23B,25B,27B,63C,108C 'windows':18A 'would':83C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2019-11-12T19:15:12+00:00","kev":{"dateAdded":"2022-05-23","dueDate":"2022-06-13","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":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2019-1385","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2019-1385","severity":null,"published_at":"2022-05-23T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T10:39:06+00:00","note":null},{"source":"epss","external_id":"CVE-2019-1385","url":"https://api.first.org/data/v1/epss?cve=CVE-2019-1385","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:45+00:00","fetched_at":"2026-10-23T19:13:45+00:00","note":null},{"source":"nvd","external_id":"CVE-2019-1385","url":"https://nvd.nist.gov/vuln/detail/CVE-2019-1385","severity":null,"published_at":"2019-11-12T19:15:12+00:00","modified_at":"2026-08-12T05:17:23+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"}