Windows SharePoint Services: http://support.microsoft.com/kb/2598130

Microsoft Office SharePoint Server: http://support.microsoft.com/kb/2598129

Office 2007 Cumulative Updates for April 2012: http://support.microsoft.com/kb/2685445

SharePoint Foundation: http://support.microsoft.com/kb/2598321

SharePoint Server 2010: http://support.microsoft.com/kb/2598151

Project Server 2010: http://support.microsoft.com/kb/2598152

Office 2010 Cumulative Updates for April 2012: http://support.microsoft.com/kb/2685449