A private endpoint is a private network connection to a cloud service that keeps traffic off the public internet. Instead of exposing a database, storage account, or API to public IP space, the service is reached through an internal address on a customer-controlled network, often using private IPs and DNS. This reduces the chance of scanning, credential stuffing, and other internet-facing attacks.
In cyber security, private endpoints are a core defense for limiting exposure, especially in multi-tenant cloud services. They help enforce network isolation, but they are not a complete security boundary on their own. Attackers may still abuse stolen credentials, misrouted trust, or flaws in the service layer itself. Defenders use private endpoints alongside firewalls, identity controls, logging, and least-privilege access to make unauthorized access harder and to contain blast radius if another control fails.