CVE-2025-33071: Microsoft Windows Server 2012

High severity, CVSS 8.1. EPSS: 23.2% chance of exploitation in the next 30 days.

Use after free in Windows KDC Proxy Service (KPSSVC) allows an unauthorized attacker to execute code over a network.

Affected products

• Microsoft Windows Server 2012: affected versions not specified; version r2 only
• Microsoft Windows Server 2016: before 10.0.14393.8148 (fixed in 10.0.14393.8148)
• Microsoft Windows Server 2019: before 10.0.17763.7434 (fixed in 10.0.17763.7434)
• Microsoft Windows Server 2022: before 10.0.20348.3745 (fixed in 10.0.20348.3745)
• Microsoft Windows Server 2022 23h2: before 10.0.25398.1665 (fixed in 10.0.25398.1665)
• Microsoft Windows Server 2025: before 10.0.26100.4270 (fixed in 10.0.26100.4270)

Published 2025-06-10. Last modified 2026-06-17.