Today, Microsoft released 4 security bulletins, 2 of which have a maximum severity rating of Critical, and 2 of which have a maximum severity rating of Important.
Microsoft products affected include Microsoft Windows, Internet Explorer and Office.
Note that this is the last set of security releases for Windows XP. If you have any hosts running on Windows XP, you should update to a newer version of Windows as soon as possible.
For specific versions and more information, see https://technet.microsoft.com/en-us/security/bulletin/ms14-apr