Update Rollup 20 for Exchange 2007 Service Pack 3 is now available for direct download. Note that mainstream support for Exchange 2007 has already ended.
This is a security update and resolves a vulnerability that could allow an Elevation of Privilege in Oracle products installed on a Microsoft Exchange Server which are a part of Outlook Web App (OWA).
View: Description of Update Rollup 19 for Exchange Server 2007 Service Pack 3
View: Microsoft Security Bulletin MS16-079
Download: Update Rollup 20 for Exchange Server 2007 Service Pack 3 (KB3151086)
