CVE-2024-21342: Microsoft Windows 11 22h2

High severity, CVSS 7.5. EPSS: 2.5% chance of exploitation in the next 30 days.

Windows DNS Client Denial of Service Vulnerability

Affected products

• Microsoft Windows 11 22h2: before 10.0.22621.3155 (fixed in 10.0.22621.3155)
• Microsoft Windows 11 23h2: before 10.0.22621.3155 (fixed in 10.0.22621.3155)
• Microsoft Windows Server 2022 23h2: before 10.0.25398.709 (fixed in 10.0.25398.709)

Published 2024-02-13. Last modified 2026-06-17.