New estimates regarding the recently-exploited Microsoft SharePoint vulnerabilities now evaluate that as many as 400 organizations may have been targeted.

Let the games begin Ransomware has officially entered the Microsoft SharePoint exploitation ring.… Late Wednesday, in an update to its earlier warning, Redmond confirmed that a threat group it tracks as Storm-2603 is abusing vulnerable on-premises SharePoint servers to deploy ransomware.

Threat actors exploit SharePoint flaws to access internal systems, steal sensitive data, and carry out surveillance, impersonation, and extortion.