Microsoft silently patched a bug in its operating system with the October 2018 update (version 1809) that allowed Microsoft Store apps with extensive file system permission to access all files on users’ computers without their consent. With Windows 10, Microsoft introduced a common platform, called(UWP), that allows apps to run on any device running Windows 10. UWP apps have the ability to access certain API, files like pictures, music, or devices like camera and microphone, by declaring required permissions in their package manifest (configuration) file.
Source: https://thehackernews.com/2018/10/windows10-uwp-apps.html