Today , we noticed Vulnerability-related.DiscoverVulnerability a pretty weird security flaw in Windows 10 Mobile . If you are using a Windows 10 Mobile that does not support Windows Hello , your are likely using a pin to secure your device . The pin can be easily set-up from Windows 10 Mobile ’ s Sign-in Options page in the Settings app . However , there ’ s an interesting issue with this system . That ’ s because you can easily remove the pin from the device without having to verify the current pin that ’ s set . For instance , if your pin is “ 2017 ” and someone else gets access to your phone , they can simply remove it without having to verify the pin . This , however , isn ’ t the case when you try to change the pin as the OS will ask you to verify the existing pin first . This may sound like a minor issue , but it actually isn ’ t one — that ’ s because someone can easily lock you out of your own device once they get the initial access ( which , to be fair , can be difficult to attain ) . For example , they can remove the current pin , and set a new one without having to verify the password for the linked Microsoft Account on the device or the pin ( since it ’ s already removed ) . This isn ’ t how the pin-lock system works on Android or iOS . Both of these operating systems require users to verify their pin/password/pattern before they can edit any of the settings related to the pin — including the ability to completely remove the pin from the device . What ’ s even more interesting is that this issue doesn’t exist on Vulnerability-related.DiscoverVulnerability Windows 10 PCs where you will be required to verify the existing pin when you try to remove the pin from a device . As far as we are aware , the issue is impacting Vulnerability-related.DiscoverVulnerability Windows 10 Mobile devices running Windows 10 Mobile Version 1511 , 1607 , and even the latest Insider preview releases . We hope Microsoft will fix Vulnerability-related.PatchVulnerability this issue in Windows 10 Mobile pretty soon , and we ’ ll let you know if and when that happens