CVE-2026-48571: Microsoft Windows 11 23h2

High severity, CVSS 7.0. EPSS: 0.3% chance of exploitation in the next 30 days.

Use after free in Windows App Installer allows an authorized attacker to elevate privileges locally.

Affected products

• Microsoft Windows 11 23h2: before 10.0.22631.7376 (fixed in 10.0.22631.7376)
• Microsoft Windows 11 24h2: before 10.0.26100.8875 (fixed in 10.0.26100.8875)
• Microsoft Windows 11 25h2: before 10.0.26200.8875 (fixed in 10.0.26200.8875)
• Microsoft Windows 11 26h1: before 10.0.28000.2269 (fixed in 10.0.28000.2269)
• Microsoft Windows Server 2025: before 10.0.26100.33158 (fixed in 10.0.26100.33158)

Published 2026-07-14. Last modified 2026-07-22.