Should organisations replace MFA with passwordless authentication?

Organisations should not treat this as a simple replacement question. MFA is still useful where passwordless is not yet available, but passwordless raises the security baseline by removing the password as the primary failure point. The right path is to use MFA as a bridge and passwordless as the destination.

Why This Matters for Security Teams

The question is not really about convenience. It is about whether the organisation can remove the password as a weak, reusable secret that attackers can phish, replay, or stuff at scale. MFA still matters, but passwordless reduces dependence on shared failure modes and aligns better with NIST Cybersecurity Framework 2.0 principles such as stronger authentication, resilience, and continuous risk management. It also fits the broader direction of Zero Trust, where identity assurance is verified continuously rather than assumed after login.

For practitioners, the real issue is transition risk. Many organisations keep MFA in place for legacy apps, break-glass access, and users who cannot yet support passkeys or device-bound credentials. That is sensible. What is not sensible is treating MFA and passwordless as equivalent end states. Passwordless is a stronger baseline because it removes the password from the attack chain, but it still needs governance, recovery controls, and phishing-resistant enrollment. The practical lesson is reinforced by incidents such as the Microsoft Midnight Blizzard breach, where identity abuse and token theft showed how quickly access can be abused once authentication is weakened. In practice, many security teams discover the limits of MFA only after credential reuse or session theft has already occurred, rather than through intentional design.

How It Works in Practice

passwordless authentication can mean several different controls: FIDO2 security keys, platform passkeys, certificate-based authentication, or device-bound credentials. The security gain comes from binding the login event to something the user has and, increasingly, something the device can prove cryptographically. That reduces phishing exposure and makes credential replay far harder. Current guidance suggests implementing passwordless alongside strong recovery procedures, because account recovery is often the weakest part of the journey.

For most organisations, the rollout should follow risk and compatibility, not enthusiasm. High-risk users, admins, and remote access portals should move first. Shared or legacy systems can remain on MFA until they are modernised. Passwordless also works best when paired with conditional access, session controls, and explicit device posture checks. This keeps authentication from being a one-time event and aligns with the monitoring and identity governance expectations reflected in NIST Cybersecurity Framework 2.0.

• Use passwordless for users and systems that can support phishing-resistant factors.
• Keep MFA for legacy applications, break-glass accounts, and staged migration paths.
• Require strong recovery workflows, because reset channels often become the attacker’s entry point.
• Review identity telemetry, especially for unusual device changes, enrollment events, and session reuse.

From an NHI management perspective, the same principle applies to service accounts and API access. Long-lived secrets should be reduced wherever possible, because passwords and static credentials both expand the blast radius when compromised. NHI research shows that 79% of organisations have experienced secrets leaks, with 77% of those incidents causing tangible damage, which is why removing reusable secrets from user authentication is only part of the broader identity-hardening strategy. The same control mindset is discussed in the Microsoft Midnight Blizzard breach analysis, where identity pathways became the attack surface. These controls tend to break down when legacy applications cannot support modern authenticators and recovery is still routed through vulnerable help desk processes.

Common Variations and Edge Cases

Tighter authentication often increases deployment and support overhead, requiring organisations to balance phishing resistance against user friction and application compatibility. That tradeoff is real, and there is no universal standard for every environment yet. Some sectors need MFA longer because endpoint trust, hardware availability, or regulatory constraints slow passwordless adoption. Others can move faster, especially where device management is mature and users already work from managed endpoints.

There are also important exceptions. Shared kiosks, contractor populations, high-turnover workforces, and air-gapped or constrained operational technology environments may not be good first candidates. In those cases, current guidance suggests using MFA as an interim control while strengthening lifecycle management, session controls, and monitoring. Passwordless does not eliminate identity governance requirements; it simply removes one major weak point. Organisations still need clear enrollment policy, fallback verification, and revocation processes for lost or replaced devices. For broader identity governance and zero trust alignment, NIST Cybersecurity Framework 2.0 remains a useful reference point, while the Microsoft Midnight Blizzard breach shows why preserving MFA alone is not enough if the surrounding identity stack remains weak.

For security leaders, the best answer is usually phased migration, not a flag day replacement. MFA is a bridge. Passwordless is the destination.

Related resources from NHI Mgmt Group

• What is the difference between passwordless login and cross-device authentication?
• Why is it crucial to adopt new authentication methods in MCP usage?
• When should organisations move beyond MFA to device-bound authentication?
• What is the difference between passwordless authentication and traditional MFA?