Today, Microsoft released 9 security bulletins. 4 have a maximum severity rating of Critical, while the other 5 have a maximum severity rating of Important. Furthermore, six of the nine bulletins either do not affect the latest version of the products or affect them with reduced severity.
Microsoft products affected include Windows, Office, Internet Explorer, IIS and Active Directory.
For specific versions and more information, see https://www.microsoft.com/technet/security/bulletin/ms10-sep.mspx