CVE-2026-0390: Microsoft Windows 10 1607

Medium severity, CVSS 6.7. EPSS: 0.3% chance of exploitation in the next 30 days.

Reliance on untrusted inputs in a security decision in Windows Boot Loader allows an authorized attacker to bypass a security feature locally.

Affected products

• Microsoft Windows 10 1607: before 10.0.14393.9060 (fixed in 10.0.14393.9060)
• Microsoft Windows 10 1809: before 10.0.17763.8644 (fixed in 10.0.17763.8644)
• Microsoft Windows 10 21h2: before 10.0.19044.7184 (fixed in 10.0.19044.7184)
• Microsoft Windows 10 22h2: before 10.0.19045.7184 (fixed in 10.0.19045.7184)
• Microsoft Windows Server 2016: before 10.0.14393.9060 (fixed in 10.0.14393.9060)
• Microsoft Windows Server 2019: before 10.0.17763.8644 (fixed in 10.0.17763.8644)
• Microsoft Windows Server 2022: before 10.0.20348.5020 (fixed in 10.0.20348.5020)

Published 2026-04-14. Last modified 2026-06-17.