CVE-2025-49735: Microsoft Windows Server 2012

High severity, CVSS 8.1. EPSS: 1.2% 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 10.0.20348.3807 (fixed in 10.0.20348.3807)
• Microsoft Windows Server 2022 23h2: before 10.0.25398.1665 (fixed in 10.0.25398.1665)
• Microsoft Windows Server 2025: before 10.0.26100.4349 (fixed in 10.0.26100.4349)

Published 2025-07-08. Last modified 2026-06-17.