As expected, Microsoft today released its regular monthly batch of security bulletins and associated patches. This month there are five bulletins, addressing 22 identified vulnerabilities. Four of the bulletins are for Windows and its components (including Internet Explorer); one of these is rated Critical, and the others Important. All supported desktop versions of Windows are affected by the Critical bulletin. (This month´s preview post has a breakdown of patches by severity and Windows version.)
The remaining bulletin, rated Important, applies to Microsoft Office, specifically Office 2003 and Office for Mac.
Microsoft says that the Windows bulletins will definitely require a system reboot; the Office bulletin may require one, depending on the configuration of your system.
For more detailed information, and download links, please see the Microsoft Security Bulletin Summary for June 2013.
As usual, I recommend applying these patches to your systems as soon as you conveniently can.
Update Tuesday, 11 June, 13:30 EDT
The Internet Storm Center at the SANS Institute has posted its usual monthly summary of Microsoft´s bulletins.