Server is a computer system or software service that receives network requests and delivers data, applications, or shared resources to other systems or users, and it matters in enterprises because it hosts core workloads, data, and digital services.
Microsoft released an out-of-band security update to address a critical remote code execution vulnerability in Windows Server Update Service (WSUS) affecting multiple Windows Server versions. CISA advises organizations to identify vulnerable servers, apply the update, monitor for exploit activity, and use mitigations if updates cannot be applied immediately.