Credential management best practices for NHI and privileged access

At a glance

What this is: This is a practitioner guide to credential management that ties together storage, rotation, monitoring, temporary credentials, and offboarding for passwords, tokens, certificates, and keys.

Why it matters: It matters because identity teams cannot treat NHI credentials as static secrets; they need lifecycle control, least privilege, and auditability to reduce theft, misuse, and privilege creep.

By the numbers:

• Over 54% of security incidents stem from credential theft.
• 59% of organizations do not manage credentials effectively.
• Over 90% of cyberattacks result from employees unwittingly supplying their login credentials to hackers.
• 42% of employees share their login credentials with their teammates.

Context

Credential management is the governance of how credentials are stored, issued, rotated, monitored, and retired. In NHI programmes, that means passwords, certificates, tokens, API keys, and encryption keys are treated as access subjects with a lifecycle, not as static secrets scattered across systems.

The security gap is not storage alone. The operational failure is allowing credentials to outlive their purpose, their owner, or their privilege boundary, which is why over-provisioning, shared credentials, and inactive accounts keep showing up as repeat weaknesses in identity programmes.

Key questions

Q: What breaks when short-lived credentials are used without identity governance?

A: The expiry window still closes, but the access problem does not. Machine identities can keep requesting new tokens, so the real failure is unowned or over-privileged identities that remain capable of reissuing access after every expiration cycle.

Q: Why do over-provisioned NHI credentials increase breach risk?

A: Over-provisioned credentials widen the blast radius of compromise. If a token or key can do more than the task requires, theft, sharing, or reuse gives an attacker broader reach than the business process needed, which makes least privilege the control that changes exposure the most.

Q: What do organisations get wrong about compromised credential monitoring?

A: A common mistake is assuming breach notification alone is enough. If organisations do not connect exposed credential signals to enforcement, the user keeps access until the next incident. Another gap is poor coverage of third party and enterprise accounts, which means high risk identities can stay active even after their credentials are known to attackers.

Q: How should organisations handle vendor and machine account offboarding?

A: They should treat vendor and machine offboarding as a mandatory security step, not a cleanup task. Every third-party or workload credential needs a revocation path, an owner, and a check that it cannot keep authenticating after the business need ends.

Technical breakdown

Credential lifecycle management for NHI access

Credential lifecycle management covers issuance, rotation, monitoring, and revocation across passwords, keys, tokens, and certificates. In NHI environments, the important detail is that a credential is not just a secret, it is also a delegated access mechanism that must be bound to an owner, a purpose, and a retirement condition. When lifecycle controls are weak, old credentials keep working long after the business need has ended, and the identity plane becomes harder to audit than the workload it protects.

Practical implication: treat every non-human credential as a managed lifecycle object with explicit expiry, ownership, and revocation paths.

Least privilege and temporary credentials

Least privilege reduces blast radius by constraining what a credential can do, while temporary credentials reduce the period during which that access exists. These controls work together because the main risk is not only stolen access, but also access that was broader or longer-lived than the task required. Temporary security credentials are most effective when paired with policy that prevents privilege accumulation and forces reauthorization when context changes.

Practical implication: replace standing access with task-scoped permissions and automatic expiry wherever the workflow allows it.

Monitoring, audit, and offboarding gaps

Monitoring tells you how credentials are used, but it does not fix overexposure by itself. The article’s core governance message is that zombie accounts, shared credentials, and unreviewed third-party access persist when onboarding and offboarding are inconsistent. That is especially true for machine identities and vendor access, where no one notices a forgotten account until it is reused or abused.

Practical implication: combine session logging, privileged access review, and automated deprovisioning for human, vendor, and machine credentials.

Breaches seen in the wild

• Azure Key Vault Contributor escalation 2024: Datadog found Azure Key Vault Contributor could add itself to access policies and read every secret, key and certificate in a vault.
• SonicWall SSL VPN account compromises 2025: Attackers used valid credentials to log in to more than 100 SonicWall SSL VPN accounts across 16 environments in October 2025.

Read and download The State of NHI & AI Agent Breach Report 2026, covering 150+ breaches impacting Non-Human Identities including AI Agents.

NHI Mgmt Group analysis

Credential management fails when organisations treat secrets as storage objects instead of governed access subjects: passwords, tokens, certificates, and keys only become manageable when ownership, scope, and retirement are defined together. The article is right to frame credential handling as lifecycle discipline rather than a vaulting exercise. The practitioner conclusion is simple: if the credential outlives its purpose, the control has already drifted.

Standing privilege remains the fault line in credential programmes: over-provisioning is not just a permissions mistake, it is a governance assumption that access can safely persist until manually corrected. That assumption breaks in cloud and hybrid environments where tasks change faster than review cycles. The implication is that access policy must be designed around task duration and privilege decay, not around static role assignment.

Zero Trust only works here when it is applied as an access model, not a slogan: the article correctly links credential management to least privilege, but the deeper point is that verification is only useful if it narrows what the credential can do after authentication. Without tight authorization boundaries, MFA and strong passwords still leave excessive reach intact. Practitioners should judge credential programmes by blast-radius reduction, not by login friction.

Zombie account persistence is the named governance failure credential teams keep rediscovering: decommissioned user, vendor, and machine accounts become latent access paths when offboarding is incomplete. That is not a hygiene issue in isolation; it is a lifecycle control gap that lets old trust survive organisational change. The practitioner conclusion is to treat offboarding as a security control, not an HR afterthought.

What this signals

Credential management is really privilege lifecycle management: the useful question is not where secrets sit, but how quickly they lose validity when the task ends, the role changes, or the account is no longer needed. That framing forces IAM teams to align provisioning, review, and deprovisioning as one control surface.

Least privilege becomes measurable only when credentials have a short operational lifespan: if access persists for weeks or months, review cycles will always trail the risk window. Practitioners should expect credential governance to move closer to issuance time, not just audit time.

For practitioners

• Implement credential lifecycle ownership Assign a named owner, business purpose, and retirement condition to every password, token, certificate, and key so no credential exists without a lifecycle decision.
• Replace standing access with temporary credentials Use temporary security credentials for tasks that do not require persistent access and set expiry to the shortest practical duration for the use case.
• Audit over-provisioned privilege regularly Review privileged accounts for access that exceeds the current job or workload need, then remove unused permissions before they become reusable attack paths.
• Automate deprovisioning for inactive identities Remove or reassign old, inactive accounts across employees, vendors, and machine identities so forgotten credentials do not remain valid after role change or departure.

Key takeaways

• Credential management is a governance problem as much as a storage problem, because the real risk comes from credentials that remain usable after their purpose changes.
• The article links credential theft, over-provisioning, and inactive accounts to the same control gap: weak lifecycle discipline across passwords, tokens, certificates, and keys.
• Teams that want lower breach exposure need lifecycle ownership, least privilege, temporary access where possible, and automated offboarding for stale identities.

Key terms

• Credential Lifecycle: Credential lifecycle is the process of issuing, rotating, expiring, and revoking secrets, certificates, and tokens across their usable life. For non-human identities, lifecycle discipline is the core control that separates temporary access from persistent exposure.
• Standing Privilege: Standing privilege is access that remains active even when no immediate task requires it. For NHI programmes, it is a common failure mode because long-lived credentials and persistent roles create unnecessary exposure. Reducing standing privilege usually means tighter expiry, on-demand access, and clearer review of who or what still needs access.
• Temporary Security Credentials: Temporary security credentials are short-lived authentication materials issued for a limited session, commonly through role assumption or token services. They reduce secret longevity, but they do not reduce risk if the underlying role or permission set is still broader than the task requires.
• Zombie Account: A zombie account is an identity that remains active after it no longer has a valid business purpose. In cloud environments, these accounts are dangerous because they often retain access, can be forgotten during offboarding, and are attractive targets for attackers looking for trusted entry points.

Deepen your knowledge

NHI governance, agentic AI identity, and machine identity lifecycle are core topics in our NHI Foundation Level course, the industry's only accredited NHI security programme. If you are building or maturing an IAM programme, it is worth exploring.