This indicates an attack attempt to exploit a memory corruption vulnerability in Microsoft Office.
The vulnerability is due to an error when the vulnerable software handles a maliciously crafted RTF file. A remote attacker may be able to exploit this to execute arbitrary code within the context of the application, via a crafted RTF file.
Microsoft Office 2010 Service Pack 2 (32-bit editions)
Microsoft Office 2010 Service Pack 2 (64-bit editions)
Microsoft Office Compatibility Pack Service Pack 3
Microsoft Office Online Server 2016
Microsoft Office Web Apps 2010 Service Pack 2
Microsoft Office Web Apps 2013 Service Pack 1
Microsoft Office Word Viewer
Microsoft SharePoint Enterprise Server 2013 Service Pack 1
Microsoft SharePoint Server 2010 Service Pack 2
Microsoft Word 2007 Service Pack 3
Microsoft Word 2010 Service Pack 2 (32-bit editions)
Microsoft Word 2010 Service Pack 2 (64-bit editions)
Microsoft Word 2013 (32-bit editions)
Microsoft Word 2013 (64-bit editions)
Microsoft Word 2013 RT Service Pack 1
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.