CVE-2019-0637: Microsoft Windows 10

High severity, CVSS 7.5. EPSS: 4.3% chance of exploitation in the next 30 days.

A security feature bypass vulnerability exists when Windows Defender Firewall incorrectly applies firewall profiles to cellular network connections, aka 'Windows Defender Firewall Security Feature Bypass Vulnerability'.

Affected products

• Microsoft Windows 10: version 1709 only; version 1803 only; version 1809 only
• Microsoft Windows Server 2016: version 1709 only; version 1803 only
• Microsoft Windows Server 2019: affected versions not specified

Published 2019-03-05. Last modified 2026-06-17.