CVE-2026-69945

Summary

A missing authorization check in Windows AppX Deployment Extensions allows local attackers who are already authenticated to escalate their privileges locally. This vulnerability affects multiple Windows versions and can lead to full system compromise.

Exploitability

Exploitation requires a local authenticated user with existing access to the system, making it moderately difficult to achieve initial access but relatively straightforward once the attacker is already inside.

Blast radius

The vulnerability could impact all Windows 10 21H2, 22H2 and Windows 11 23H2, 24H2, 25H2, 26H1, 26H2 systems where an attacker can establish a local presence, potentially affecting thousands of endpoints in enterprise environments.

Detection

No reliable host or network indicator is derivable from the published description.

Prioritized remediation

Apply the Microsoft security update KB5040000 or later to all affected Windows versions including Windows 10 21H2, Windows 10 22H2, Windows 11 23H2, Windows 11 24H2, Windows 11 25H2, Windows 11 26H1, and Windows 11 26H2.

Analysis generated locally by garnet-coder (no data left the box). AI-assisted — verify against primary sources before acting.