Affected: Microsoft Internet Explorer 9, Microsoft Internet Explorer 11, Microsoft Internet Explorer 11 on Windows Server 2012, Microsoft Internet Explorer 11 on Windows 10 Version 1903 for 32-bit Systems, Microsoft Internet Explorer 11 on Windows 10 Version 1903 for x64-based Systems, Microsoft Internet Explorer 11 on Windows 10 Version 1903 for ARM64-based Systems, Microsoft Internet Explorer 10, Microsoft Edge (EdgeHTML-based) on Windows 10 for 32-bit Systems, Microsoft Edge (EdgeHTML-based) on Windows 10 for x64-based Systems, Microsoft Edge (EdgeHTML-based) on Windows Server 2016 and 17 more

A security feature bypass vulnerability exists when Microsoft Browsers fail to validate the correct Security Zone of requests for specific URLs, aka 'Microsoft Browser Security Feature Bypass Vulnerability'.