SharePoint Server is Microsoft’s on-premises platform for collaboration, document management, intranet sites, and internal workflows. Organizations use it to store files, publish content, manage permissions, and connect business processes inside their own network.
In cyber security, SharePoint Server matters because it often sits close to valuable internal data and administrative functions. If attackers find an authentication bypass, deserialization issue, or other server-side flaw, they may be able to reach content or actions that should be restricted to trusted users. That can turn a web application bug into a broader compromise path, especially when the server is internet-facing. Defenders therefore treat SharePoint as a high-priority asset: they patch quickly, limit direct exposure, enforce strong authentication, and monitor logs for unusual sign-ins, requests, or changes to sites and permissions.