Multiple serious vulnerabilities have been found in Microsoft Silverlight. Malicious users can exploit these vulnerabilities to execute arbitrary code or bypass security restrictions.

Below is a complete list of vulnerabilities

1. Improper requests handling can be exploited remotely via a specially designed Silverlight application to execute arbitrary code;
2. Improper memory handling can be exploited remotely via a specially designed Silverlight application to bypass security restrictions.

Microsoft Silverlight 5

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

CVE-2015-6114
CVE-2015-6166
CVE-2015-6165

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