Most breaches don’t happen through your core systems. They come through identity gaps in vendors, partners, and contractors—the people and systems you trust by default. Identity third-party risk assessment is how you expose those risks before someone else does. It’s not just a compliance checkbox. It’s the safeguard that stops credential misuse, supply chain compromise, and silent privilege escalation.
A strong assessment process starts with visibility. Map every identity—human and machine—that touches sensitive resources through a third party. Collect the minimum viable dataset: authentication methods, MFA enforcement, provisioning flows, role assignments, and termination timelines. Without that map, you’re navigating blind.
Next, look at controls. Does each third party enforce least privilege? Are accounts federated instead of stored locally? Is there monitoring for anomalous access? These questions turn abstract identity risk into quantifiable metrics you can track over time.
Then comes verification. Paper policies don’t mean much without proof. Pull evidence of MFA logs. Review admin accounts across environments. Check if service accounts expire—or just linger. This is where you find zombie identities and forgotten backdoors.