Security researchers have discovered a vulnerability in Microsoft's Zero Outage Multi-Factor Authentication (MFA).
Specifically, it is about a faulty implementation of FIDO2 and WebAuthn support, as Dominik Schürmann and Vincent Breitmos from Cotech found out want to have.
FIDO2 or WebAuthn is an open standard for secure authentication on websites and online services. Many Internet service providers have already adopted the FIDO standard and thus offer their users more security when logging in.
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