CVE-2026-42987: Microsoft Windows Server 2012

High severity, CVSS 8.1. EPSS: 0.7% chance of exploitation in the next 30 days.

Use after free in Windows Deployment Services 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 10.0.14393.9234 (fixed in 10.0.14393.9234)
• Microsoft Windows Server 2019: before 10.0.17763.8880 (fixed in 10.0.17763.8880)
• Microsoft Windows Server 2022: before 10.0.20348.5256 (fixed in 10.0.20348.5256)
• Microsoft Windows Server 2025: before 10.0.26100.32995 (fixed in 10.0.26100.32995)

Published 2026-06-09. Last modified 2026-07-23.