In all, it fixed 46 vulnerabilities across products including Windows, Internet Explorer and Office. The patches were organized in 13 security bulletins, three flagged as critical and ten as important. The priority for administrators should be MS15-043 which fixes 22 vulnerabilities in IE, of which 14 are rated critical. The critical bulletins cover remote code execution vulnerabilities in Windows, IE, Office, Microsoft.NET Framework, Microsoft Lync and Silverlight. Attackers could exploit these flaws by embedding a specially crafted font in documents or Web pages.”]