MFA Security Issues

How to Improve Passwordless MFA Authentication Security

Jason MillerJason Miller Oct 22, 2026 868 views

Question details

Users and administrators need strategies to enhance the security of passwordless Multi-Factor Authentication (MFA) and prevent vulnerabilities like MFA fatigue and accidental approvals.

How to Improve the Security of Passwordless MFA Authentication
Product
Enterprise Identity Management
Device & OS
not provided
Scenario
Securing user logins and mitigating fraudulent sign-in approvals in a passwordless environment.
Observed behavior
Attackers exploit MFA fatigue by sending repeated fraudulent sign-in prompts, hoping the user accidentally approves one.
Before you start

Ensure you have administrator access to your organization's identity management portal (such as Microsoft Entra ID or Okta) to configure and enforce authentication policies.

Solution 1Recommended

Enable Number Matching and Phishing-Resistant Methods

Prevents accidental approvals by forcing the user to type a specific number displayed on the login screen into their authenticator app.

Relying solely on simple "Approve/Deny" push notifications leaves users vulnerable to MFA fatigue. By implementing number matching, you ensure the user is actively looking at the login screen when approving a request.

For highly privileged accounts, you should transition to fully phishing-resistant methods.

1
Access Authentication Methods

Log into your identity provider's administrator console and navigate to the Security or Authentication Methods section.

2
Enable Number Matching

Locate the settings for your authenticator app and enable the 'Require number matching for push notifications' policy.

3
Configure Phishing-Resistant Hardware

Enforce policies to prefer or require FIDO2 security keys, passkeys, or certificate-based authentication for administrative and highly privileged accounts.

Enable Number Matching and Phishing-Resistant Methods
Security Boost: Number matching completely neutralizes basic MFA fatigue attacks because the attacker cannot see the required number from their remote location.
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Frequently Asked Questions

What is MFA fatigue or MFA spam?

MFA fatigue occurs when an attacker repeatedly sends push notification approval requests to a user's device, hoping the targeted user will eventually approve it out of annoyance or by accident.

Are biometric logins considered passwordless MFA?

Yes, biometrics like fingerprint or facial recognition are strong, passwordless authentication methods. When combined with a trusted hardware device, they satisfy multi-factor authentication requirements securely.

Does WPS Office support enterprise SSO and MFA?

Yes, WPS Office Enterprise supports integration with major Identity Providers (IdPs) through SSO (Single Sign-On), allowing you to seamlessly enforce your organization's MFA and passwordless authentication policies.

Is two-factor authentication mandatory for attack-surface-reduction rules?

While not strictly mandated by every generic attack-surface-reduction rule, implementing a strong two-factor or multi-factor combination is highly recommended, especially for accounts with privileged access.