An improper scanning of specially designed files was found in Microsoft Malware Protection Engine in Microsoft Windows. By exploiting this vulnerability malicious users can cause a denial of service. This vulnerability can be exploited remotely by putting a specially designed file to a directory scanned by the Microsoft Malware Protection Engine. It can be done via a website when it is being viewed by a user, via email message or an Instant Messenger message or a shared location.

Windows Server 2008 R2 Service Pack 1
Windows 7 Service Pack 1
Windows 8.1
Windows RT 8.1
Windows 10
Windows Server 2016

Check whether version of Microsoft Malware Protection Engine is later than 1.1.13704.0 or not. If it is necessary – install update. However, enterprise administrators or end users do not have to take any actions to install updates for Microsoft Malware Protection Engine because the update will be detected and applied automatically within 48 hours of release.

CVE-2017-8542