CVE-2019-1385 — Windows AppX Deployment Extensions Elevation of Privilege Vulnerability

Executive Summary

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.

Overview

7.8

CVSS HIGH

Important

MS Severity

Not Exploited

MS Exploit Status

Less Likely

MS Exploit Likelihood

Category Elevation of Privilege

Released Nov 12 2019

Last Updated Nov 12 2019

Publicly Disclosed No

CISA KEV Listed (added 2022-05-23)

Known Exploits None Known

EPSS Score 0.03478 — 0.87573 percentile

CVSS Vector

ATTACK VECTOR

Local

ATTACK COMPLEXITY

Low

PRIVILEGES REQUIRED

Low

USER INTERACTION

None

SCOPE

Unchanged

Temporal Score: 7.0

EPSS Score

0.03478

probability of exploitation in the next 30 days

0.87573 percentile - updated 2026-06-20

View on FIRST.org

Affected Products

16 affected products

Product	KB Article	Severity	Impact	Restart Required
Windows 10 Version 1709 for 32-bit Systems	`4525241 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 Version 1709 for ARM64-based Systems	`4525241 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 Version 1709 for x64-based Systems	`4525241 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 Version 1803 for 32-bit Systems	`4525237 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 Version 1803 for ARM64-based Systems	`4525237 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 Version 1803 for x64-based Systems	`4525237 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 Version 1809 for 32-bit Systems	`4523205 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 Version 1809 for ARM64-based Systems	`4523205 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 Version 1809 for x64-based Systems	`4523205 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 Version 1903 for 32-bit Systems	`4524570 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 Version 1903 for ARM64-based Systems	`4524570 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 Version 1903 for x64-based Systems	`4524570 (Security Update)`	Important	Elevation of Privilege	Yes
Windows Server 2019	`4523205 (Security Update)`	Important	Elevation of Privilege	Yes
Windows Server 2019 (Server Core installation)	`4523205 (Security Update)`	Important	Elevation of Privilege	Yes
Windows Server, version 1803 (Server Core Installation)	`4525237 (Security Update)`	Important	Elevation of Privilege	Yes
Windows Server, version 1903 (Server Core installation)	`4524570 (Security Update)`	Important	Elevation of Privilege	Yes

Patches

4 patches

Article	Type	Restart
`4525241`	Security Update	Yes
`4525237`	Security Update	Yes
`4523205`	Security Update	Yes
`4524570`	Security Update	Yes

Known Exploits

No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.

Acknowledgments

Abdelhamid Naceri, Trend Micro's Zero Day Initiative, Polar Bear, Andrea Pierini & Christian Danieli

References

MSRC Advisory MITRE NVD