How should organisations govern vendor access as part of identity management?

Treat vendor access as a lifecycle-controlled identity, not as a loose operational convenience. Every external account, token, or delegated permission should have an owner, a purpose, an expiry condition, and a documented revocation path. That approach keeps procurement, security, and IAM aligned and makes offboarding enforceable instead of optional.

Why This Matters for Security Teams

Vendor access is one of the most common places where identity discipline breaks down because it sits between procurement, security, and operations. External accounts often arrive with unclear ownership, shared usage, or standing privileges that persist long after the work is done. That creates an identity problem, not just a contract problem, and it is especially risky when the vendor is connecting through API keys, service accounts, or delegated admin roles.

Current guidance from the NIST Cybersecurity Framework 2.0 and the OWASP Non-Human Identity Top 10 points in the same direction: external access should be governed as a lifecycle with explicit approval, scope, monitoring, and revocation. NHIMG research shows why this matters in practice, with only 20% of organisations having formal processes for offboarding and revoking API keys, and 92% exposing NHIs to third parties. That combination turns routine vendor access into a durable attack path unless identity controls are enforced end to end.

In practice, many security teams discover vendor overreach only after a contract has ended or a third-party incident exposes that the access was never fully removed.

How It Works in Practice

The most reliable model is to treat every vendor identity as a named, traceable asset with a business owner, approved purpose, scope boundary, expiry condition, and revocation workflow. That includes human vendor users, shared support accounts, automation tokens, service principals, and any delegated permissions that the vendor can exercise in your environment. The goal is to make the access reviewable in the same way as any other privileged identity.

Operationally, this usually means tying access issuance to procurement and ticketing workflows, then binding the account to a specific control set. For example, access should be granted only to the resources required for the engagement, ideally with role-based access control where role scope is narrow and audit-friendly. Where possible, use just-in-time access so privileged permissions exist only for the task window, and prefer short-lived secrets or federated tokens over static credentials. NHI governance research from Ultimate Guide to NHIs and the NHI Lifecycle Management Guide shows why lifecycle control, rotation, and offboarding are not optional extras; they are the control plane.

• Assign each vendor identity an internal owner who can approve, review, and revoke it.
• Use expiry dates for accounts, tokens, certificates, and delegated permissions.
• Record the business purpose and systems in scope before access is enabled.
• Require periodic recertification for active vendors, not just annual audits.
• Automate revocation on contract end, project closure, or incident trigger.

These controls break down when vendors rely on shared credentials across multiple client environments because attribution, rotation, and timely revocation become unreliable.

Common Variations and Edge Cases

Tighter vendor control often increases coordination overhead, so organisations must balance rapid onboarding against auditability and revocation certainty. That tradeoff is real, especially for managed service providers, integration partners, and emergency support arrangements where speed matters.

Best practice is evolving for complex vendor ecosystems, but one principle is clear: shared accounts should be the exception, not the default, and any exception should have compensating controls such as session logging, approval records, and aggressive expiry. For high-risk vendors, security teams often add stronger checks such as network restrictions, device posture validation, or step-up approval for privileged actions. The challenge is that a single vendor can span multiple identities, so the offboarding process must cover all tokens, API keys, certificates, and delegated grants, not just the named user account. NHIMG’s regulatory and audit perspectives and Top 10 NHI Issues both reinforce that visibility and lifecycle enforcement are what make vendor governance defensible.

There is no universal standard for this yet, but organisations that cannot inventory vendor access by owner, purpose, and expiry are usually operating with hidden standing privilege.

Related resources from NHI Mgmt Group

• How should organisations govern vendor access in enterprise access management?
• How should organisations govern SaaS access as part of lifecycle management?
• How should security teams implement Triple-A identity access management standards?
• Who should own vendor risk management in an identity programme?