Security update available for Exchange 2007, 2010 and 2013

has released a fix for Web App in all supported versions of .
In all cases, it comes to security issues that have been designated as Important.

Four security updates are also those offered by Microsoft Update, but here are the manually download links:

Rollup 15 for Exchange Server 2007 Service Pack 3
Rollup 8 for Exchange 2010 SP3
Security Update For Exchange Server 2013 SP1 (KB3011140)
Security Update For Exchange Server 2013 CU6 (KB3011140)
Cumulative Update 7 for Exchange Server 2013 (Provided not with Update)

Versions that are not listed here are no longer supported or are not vulnerable. For more information read the security bulletin MS14-075: Vulnerabilities in Microsoft Exchange Server Could Allow Elevation of Privilege (3,009,712)