What breaks when security teams rely on passkeys without removing weaker account recovery options?

The control gap appears at the recovery and exception layer. Attackers often target the weakest remaining path, not the passkey itself. If app passwords, reset flows, or device-code approvals are still available, account takeover can still succeed. Organisations need to audit every alternate authentication path and treat it as part of the attack surface.

Why This Matters for Security Teams

Passkeys reduce phishing risk, but they do not eliminate account takeover if weaker recovery paths remain in place. The real exposure is usually the exception layer: app passwords, SMS resets, backup codes, help-desk overrides, and device-code approvals that were left untouched when passkeys were added. Attackers do not need to break the stronger factor if a weaker path still grants a valid session.

This is especially important for identities that already carry broad access, including privileged users and service-linked accounts. NHIMG’s Ultimate Guide to NHIs notes that 97% of NHIs carry excessive privileges, which is a reminder that identity hardening must cover every way an account can be recovered or reactivated. Current guidance from the NIST Cybersecurity Framework 2.0 aligns with this by treating identity assurance as an end-to-end control problem, not a single authenticator decision.

In practice, many security teams encounter passkey bypass only after a support escalation or account recovery abuse has already been used to complete the takeover.

How It Works in Practice

The operational mistake is to deploy passkeys as a front-door control while leaving fallback paths under older trust assumptions. A secure rollout should inventory every authentication and recovery route, then classify each one by assurance level, abuse potential, and administrative exception handling. That includes the login flow, password reset flow, backup-code issuance, help-desk identity proofing, federated sign-in recovery, and any conditional approval process that can mint a new session.

For many organisations, the correct response is not just “turn on passkeys,” but “remove or severely restrict all weaker alternatives.” That usually means disabling app passwords where possible, tightening recovery to high-assurance channels, making backup codes single-use and tightly governed, and setting administrative approval for edge cases rather than broad user self-service. The NIST SP 800-53 Rev. 5 Security and Privacy Controls is useful here because identity proofing, access enforcement, and account recovery should be treated as separate control families with distinct review and logging requirements.

• Map every recovery path to the same threat model used for primary authentication.
• Remove low-assurance fallbacks rather than simply documenting them.
• Apply step-up checks for high-risk recovery events, especially admin and finance accounts.
• Log recovery actions with enough detail to detect repeated probing or social engineering.

NHIMG’s Ultimate Guide to NHIs also shows how often identity weaknesses persist after notification, with 91.6% of secrets still valid five days after a compromise notice, which illustrates how slowly exception paths get removed when they are not explicitly owned. These controls tend to break down in legacy SSO estates and outsourced help-desk environments because recovery logic is fragmented across systems that were never designed to share a unified assurance policy.

Common Variations and Edge Cases

Tighter recovery controls often increase support burden and user friction, so organisations have to balance availability against takeover resistance. That tradeoff is real, especially for executives, contractors, shared devices, and users who routinely lose access to the hardware needed for passkeys.

Best practice is evolving, but the direction is clear: if a weaker recovery method must exist, it should be rarer, more monitored, and more heavily verified than the primary login. Some environments still need break-glass access, regulatory exception handling, or offline recovery, but those paths should be isolated, time-bound, and reviewed as privileged access rather than ordinary user support. This matters even more where OAuth-based delegated access, device-code flows, or managed endpoints create alternate ways to mint trust outside the passkey ceremony. The risk is not the passkey itself; it is the mismatch between a strong primary factor and a weak operational recovery process.

For teams looking at broader identity posture, passkey adoption should be paired with the same discipline used for NHI governance: inventory, minimize, rotate where relevant, and revoke aggressively. That broader lifecycle view is part of why NHIMG research remains useful when passkey projects stall at implementation details instead of closing the full attack surface.

Related resources from NHI Mgmt Group

• How should security teams roll out passkeys without breaking account recovery?
• How should security teams handle account recovery without relying on security questions?
• What breaks when passkeys are synced without strong account recovery controls?
• How should security teams reduce account recovery risk without making sign-in harder?