Microsoft released KB4601315 cumulative Update to the public today. This update resolves Security issues found in Windows 10 1909. Your build number will be 18363.1377 after installing this update.

KB4601315 Highlights:

  • Updates to improve security when using input devices such as a mouse, keyboard, or pen.

  • Updates for verifying usernames and passwords.

Improved and fixed in KB4601315:

This security update includes quality improvements. Key changes include:

  • Addresses a possible elevation of privilege vulnerability in the win32k component.
  • Security updates to Windows App Platform and Frameworks, Windows Apps, Windows Input and Composition, Windows Cloud Infrastructure, Windows Management, Windows Authentication, Windows Fundamentals, Windows Cryptography, Windows Virtualization, Windows Core Networking, and Windows Hybrid Cloud Networking.

Download: Update catalog
Support Notes: Read Here