CVE-2019-1064: Microsoft Windows AppX Deployment Service (AppXSVC) Privilege Escalation Vulnerability

High severity, CVSS 7.8. Actively exploited: in CISA KEV since 2022-03-15. EPSS: 6.9% chance of exploitation in the next 30 days.

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. To 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. The security update addresses the vulnerability by correcting how Windows AppX Deployment Service handles hard links.

Affected products

• Microsoft Windows 10 1607: affected versions not specified
• Microsoft Windows 10 1703: affected versions not specified
• Microsoft Windows 10 1709: affected versions not specified
• Microsoft Windows 10 1803: affected versions not specified
• Microsoft Windows 10 1809: affected versions not specified
• Microsoft Windows 10 1903: affected versions not specified
• Microsoft Windows Server 1709: affected versions not specified
• Microsoft Windows Server 1803: affected versions not specified
• Microsoft Windows Server 1903: affected versions not specified
• Microsoft Windows Server 2016: affected versions not specified
• Microsoft Windows Server 2019: affected versions not specified

Published 2019-06-12. Last modified 2026-06-17.