A vendor inventory is an authoritative, maintained record of the third parties an organization relies on and tracks for security review. It may include suppliers, service providers, and business partners, along with details such as service ownership, data access, criticality, and the status of security assessments.
In third-party risk management, the inventory is the foundation for deciding which vendors to assess and monitor. Inaccurate or duplicated records can cause teams to miss suppliers, double-count risk, or rely on stale reviews. Organizations should assign clear ownership, reconcile records across business systems, and update the inventory when relationships or services change. Security teams can then use it to prioritize assessments and outside-in monitoring based on each vendor’s role and exposure.