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Multiple vulnerabilities were found in Microsoft browsers. Malicious users can exploit these vulnerabilities to execute arbitrary code, spoof user interface, obtain sensitive information.

Below is a complete list of vulnerabilities:

1. A memory corruption vulnerability in Chakra Scripting Engine can be exploited remotely via specially crafted website to execute arbitrary code.
2. A tampering vulnerability in Microsoft Browsers can be exploited remotely via specially crafted website to spoof user interface.
3. A memory corruption vulnerability in Scripting Engine can be exploited remotely via specially crafted website to execute arbitrary code.
4. An information disclosure vulnerability in Microsoft Edge can be exploited remotely via specially crafted content to obtain sensitive information.
5. An information disclosure vulnerability in Microsoft Scripting Engine can be exploited remotely via specially crafted content to obtain sensitive information.

Malware exists for this vulnerability. Usually such malware is classified as Exploit. More details.

Internet Explorer 10
Internet Explorer 11
Internet Explorer 9
Microsoft Edge

Install necessary updates from the KB section, that are listed in your Windows Update (Windows Update usually can be accessed from the Control Panel)