Deserialization of untrusted data in Windows Server Update Service allows an unauthorized attacker to execute code over a network.

Windows Reliable Multicast Transport Driver (RMCAST) Remote Code Execution Vulnerability

Windows OLE Remote Code Execution Vulnerability

Windows Print Spooler Remote Code Execution Vulnerability

A remote code execution vulnerability exists when the Windows Print Spooler service improperly performs privileged file operations. An attacker who successfully exploited this vulnerability could run arbitrary code with SYSTEM privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. UPDATE August 10, 2021: Microsoft has completed the investigation and has released security updates to address this vulnerability. Please see the Security Updates table for the applicable update for your system. We recommend that you install these updates immediately. This security update changes the Point and Print default behavior; please see KB5005652.