CVE-2026-21519

Summary dbcve.org

A type confusion vulnerability in the Desktop Window Manager (dwm.exe) allows a locally authorized attacker to elevate privileges to higher permissions. The vulnerability stems from improper type handling when accessing resources, enabling an attacker with initial local access to gain elevated privileges on the affected system.

Mitigation

Apply the Microsoft security update for CVE-2026-21519 via Windows Update or enterprise patch management tools. Prioritize patching systems with direct user access as the attacker requires local authorization.