This indicates an attack attempt to exploit a Remote Code Execution Vulnerability in Microsoft SharePoint.
The vulnerability is due to an error in the vulnerable application when handling a maliciously crafted BDC model file. An attacker can exploit this by tricking an unsuspecting user into downloading such malicious file and execute arbitrary code within the context of the application.
Microsoft SharePoint Foundation 2010 Service Pack 2
Microsoft SharePoint Enterprise Server 2016
Microsoft SharePoint Server 2019
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.