CVE-2026-23656: Microsoft Windows App

Medium severity, CVSS 5.9. EPSS: 0.3% chance of exploitation in the next 30 days.

Insufficient verification of data authenticity in Windows App Installer allows an unauthorized attacker to perform spoofing over a network.

Affected products

• Microsoft Windows App: before 2.0.964.0 (fixed in 2.0.964.0)

Published 2026-03-10. Last modified 2026-06-17.