This host is missing a critical security update according to Microsoft Bulletin MS14-081.
Successful exploitation will allow remote attackers to execute the arbitrary code, cause memory corruption and compromise the system. Impact Level: System/Application
Apply the patch from below link, https://technet.microsoft.com/en-us/security/bulletin/ms14-081
The flaws are due to, - An invalid indexing error when parsing Office files can be exploited to execute arbitrary code via a specially crafted Office file. - A use-after-free error when parsing Office files can be exploited to execute arbitrary code via a specially crafted Office file.
Microsoft Office 2011 on Mac OS X
Get the vulnerable file version and check appropriate patch is applied or not.