How should security teams implement break glass access for privileged accounts during outages or cyber incidents?

What break glass access should and should not be for

Break glass access is an emergency control for recovery when normal privileged workflows are unavailable, unsafe, or too slow. It should exist to restore service, contain damage, or complete a critical response step, not to replace day-to-day privileged access. That distinction matters because the control only stays defensible if it is exceptional, bounded, and reviewable.

A good break glass design starts with a small, named set of accounts or credentials, each protected by strong authentication, tight scope, and clear ownership. The access path should be separate from routine admin roles, and the operational rule should be that use is rare, deliberate, and time-boxed. If it starts to feel convenient, it is probably becoming standing privilege.

For teams building the surrounding privileged access model, NHIMG’s Privileged Access Management Guide is the right parent concept because break glass only works cleanly when it sits inside a broader zero standing privilege design.

How to design and test emergency privileged access

Emergency access should be engineered for use under pressure, which means the process must be simple enough to execute during an outage but still precise enough to survive audit and post-incident review. The account should be protected by more than a password alone, with strong logging, monitored use, and explicit expiry after activation. Avoid building a path that depends on a single person remembering an undocumented step.

Testing is part of the control, not an optional drill. Exercise the full sequence in incident response and recovery scenarios, including how the team obtains approval, how access is activated, how actions are recorded, and how the account is disabled or deleted once normal operations return. The design should also assume that the primary identity system may be unavailable, degraded, or under attack.

If the problem is an IdP outage or compromise, use NHIMG’s Emergency Identity Operations When the Primary IdP Is Unavailable to ground the access path in recovery, not convenience.

When the emergency path is being defined in cloud directories and critical platforms, the Break-Glass and Emergency Access Account Guide is the most directly relevant reference for design, monitoring, and testability.

What happens after break glass is used

Once emergency access has been used, the priority shifts from restoration to cleanup. Teams should review the exact command history, the duration of access, the systems touched, and whether any compensating control was bypassed during the incident. The account should then be disabled, deleted, or reconstituted according to policy, and any exposed secrets, sessions, or delegated privileges should be rotated or revoked if there is even a plausible exposure path.

That post-use discipline is what keeps break glass from turning into a hidden backdoor. If the account remains available after the incident, the organisation has effectively converted an emergency control into an alternate admin path, which undermines least privilege and makes future compromise easier to hide. Recovery should end with evidence capture, not just restored availability.

Teams managing cloud recovery identities should also review NHIMG’s Protecting Cloud Control-Plane Recovery Accounts and Credentials because recovery accounts are high-value targets during both outages and cyber incidents.

For incident handling that must include revocation and evidence preservation, the Incident Response Plan Template provides a useful operational anchor for logging, escalation, and credential revocation steps.

Risk and Threat Considerations

Break glass access reduces downtime, but it also concentrates risk because a small number of credentials can bypass normal controls at the exact moment visibility is lowest. If those credentials are overprivileged, long-lived, or poorly monitored, an attacker can abuse the same emergency route used by defenders to gain rapid high-impact access.

Failure mechanism: the emergency account becomes a standing privileged path, is reused outside true emergencies, or is left active after the event. Weak logging, shared credentials, and poor offboarding make it hard to prove who used it and whether any malicious activity occurred during the window of access.

Impact: the organisation may restore service quickly but inherit an unreviewed high-trust access path, increased blast radius, and a cleaner persistence route for an intruder. In the worst case, the account that was meant to recover the environment becomes the account that lets an attacker keep control of it.

Practitioner Guidance

What to verify: confirm that each break glass account has a named owner, a documented activation path, and a predictable deactivation step. If you cannot show who approved use, when it was enabled, and when it was retired, the control is not operationally trustworthy.

Decision rule: if the account is needed more than once for the same class of outage, redesign the normal access model rather than normalising emergency use. Break glass should absorb exceptional failure, not compensate for weak routine administration.

Practitioner takeaway: the control is successful only when it restores service without creating a reusable privileged shortcut, so the real test is whether the account can be used, observed, and removed cleanly under pressure.

Related resources from NHI Mgmt Group

• Why does standing privileged access become more dangerous during outages or cyber incidents?
• How should security teams implement ephemeral privileged access for Linux hosts without creating long-lived administrative accounts?
• Why do break glass accounts create both resilience and risk in privileged access management?
• How should security teams secure break glass accounts without making emergency access fragile?