PT-2026-58175 · Microsoft · Appx Deployment Service

Published 2026-07-14 · Updated 2026-07-15 · CVE-2026-49803

Positive Technologies (AI Summary)

CVSS v3.1

7.0

High

Base vector

AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Windows AppX Deployment Service (affected versions not specified)

Description A race condition exists in the Windows AppX Deployment Service. This occurs when concurrent execution using a shared resource lacks proper synchronization, allowing an authorized local attacker to elevate their privileges.

Recommendations Install the July updates to resolve this issue.

Fix

Race Condition

Weakness Enumeration

CWE-362

Related Identifiers

CVE-2026-49803

Affected Products

Appx Deployment Service

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-49803 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49803 · Vendor Advisory
• https://twitter.com/windowsforum/status/2077242541976535380 · Twitter Post