CVE-2026-50518: Microsoft Windows 10 1607

Critical severity, CVSS 9.8. EPSS: 1% chance of exploitation in the next 30 days.

Heap-based buffer overflow in Windows DHCP Server allows an unauthorized attacker to execute code over a network.

Affected products

• Microsoft Windows 10 1607: before 10.0.14393.9339 (fixed in 10.0.14393.9339)
• Microsoft Windows 10 1809: before 10.0.17763.9020 (fixed in 10.0.17763.9020)
• Microsoft Windows Server 2012: affected versions not specified; version r2 only
• Microsoft Windows Server 2016: before 10.0.14393.9339 (fixed in 10.0.14393.9339)
• Microsoft Windows Server 2019: before 10.0.17763.9020 (fixed in 10.0.17763.9020)
• Microsoft Windows Server 2022: before 10.0.20348.5386 (fixed in 10.0.20348.5386)
• Microsoft Windows Server 2025: before 10.0.26100.33158 (fixed in 10.0.26100.33158)

Published 2026-07-14. Last modified 2026-07-22.