Today, Microsoft released four security bulletins describing five vulnerabilities that affect Windows. Each vulnerability affects different versions of Windows to varying degrees. However, a remote attacker could exploit the worst of these flaws to gain complete control of your Windows PC. We recommend you download, test, and deploy these updates – especially the critical ones – as quickly as possible.

As part of today’s Patch Day, Microsoft released a security bulletin describing a serious security vulnerability in the Windows version of Word — part of Microsoft Office package. The flaw doesn’t affect the Mac versions, but does affect the Word viewer and Office Compatibility Packs.

As part of today’s Patch Day, Microsoft released a security bulletin describing four vulnerabilities found in Excel — part of Microsoft Office for Windows and Mac. The flaws also affect the Excel viewer and Office Compatibility Package.

Today, Microsoft released three security bulletins describing ten vulnerabilities that affect Windows and components that often ship with it, such as the .NET Framework.