Exchange Server 2007 SP3 RU11 has been released on August 13, 2013. Below is the detail information.
2873746 Description of Update Rollup 11 for Exchange Server 2007 SP3
For the issues that fix in this CU, please refer to the below table:
Update Rollup 11 for Exchange Server 2007 SP3 addresses the vulnerabilities that are described in Microsoft Security Bulletin MS13-061 (http://technet.microsoft.com/en-us/security/bulletin/MS13-061) and resolves the issues that are described in the following Microsoft Knowledge Base articles:
The last public folder database on Exchange 2007 cannot be removed after migrating to Exchange 2013
W3wp.exe consumes excessive CPU resources on Exchange Client Access servers when users open recurring calendar items in mailboxes by using OWA or EWS
For more information on Exchange RU version, please refer to the following link: