Technical Information

Brief overview of the risk:
The vulnerability could allow elevation of privilege if the Windows Installer service improperly runs custom action scripts. An attacker must first compromise a user who is logged on to the target system to exploit the vulnerability.

Detailed Information on the risk:

An elevation of privilege vulnerability exists in some cases in the Windows Installer service when it improperly runs custom action scripts. An attacker who successfully exploited this vulnerability could elevate privileges on a targeted system. An attacker could then install programs; view, change, or delete data; or create new accounts with full administrative rights.

Further information on this exploit is available at : MS15-074

Windows Server 2003 Service Pack 2 
Windows Server 2003 x64 Edition Service Pack 2 
Windows Server 2003 with SP2 for Itanium-based Systems 
Windows Server 2003 R2 Service Pack 2 
Windows Server 2003 R2 x64 Edition Service Pack 2 
Windows Vista Service Pack 2 
Windows Vista x64 Edition Service Pack 2 
Windows Server 2008 for 32-bit Systems Service Pack 2 
Windows Server 2008 for x64-based Systems Service Pack 2 
Windows Server 2008 for Itanium-based Systems Service Pack 2 
Windows 7 for 32-bit Systems Service Pack 1 
Windows 7 for x64-based Systems Service Pack 1 
Windows Server 2008 R2 for x64-based Systems Service Pack 1 
Windows Server 2008 R2 for Itanium-based Systems Service Pack 1 
Windows 8 and Windows 8.1
Windows 8 for 32-bit Systems 
Windows 8 for x64-based Systems 
Windows 8.1 for 32-bit Systems 
Windows 8.1 for x64-based Systems 
Windows Server 2012 and Windows Server 2012 R2
Windows RT and Windows RT 8.1
Windows RT[1] 
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 
Windows Server 2012 (Server Core installation) 
Windows Server 2012 R2 (Server Core installation)