CVE-2026-62818: Microsoft Windows 10 1607

High severity, CVSS 8.8. EPSS: 0.9% chance of exploitation in the next 30 days.

Use after free in Active Directory Certificate Services (AD CS) allows an authorized attacker to execute code over a network.

Affected products

• Microsoft Windows 10 1607: before 10.0.14393.9418 (fixed in 10.0.14393.9418)
• Microsoft Windows 10 1809: before 10.0.17763.9115 (fixed in 10.0.17763.9115)
• Microsoft Windows Server 2012: affected versions not specified; version r2 only
• Microsoft Windows Server 2016: before 10.0.14393.9418 (fixed in 10.0.14393.9418)
• Microsoft Windows Server 2019: before 10.0.17763.9115 (fixed in 10.0.17763.9115)
• Microsoft Windows Server 2022: before 10.0.20348.5440 (fixed in 10.0.20348.5440)
• Microsoft Windows Server 2025: before 10.0.26100.33222 (fixed in 10.0.26100.33222)

Published 2026-08-11. Last modified 2026-08-16.