How Effective Is MFA, Really? An Evidence-Based Answer (2026)
Security Boulevard, Tuesday, July 14th, 2026
MFA blocks the overwhelming majority of account compromises, but effectiveness varies sharply by factor type.
Microsoft research cited in the article shows MFA reduces account compromise risk by 99.22%. Effectiveness varies by method: SMS codes and push notifications remain exposed to prompt bombing and phishing, while FIDO2 security keys and passkeys provide cryptographic, phishing-resistant protection.
Bypass techniques appear in roughly 14-18% of documented incidents and generally target human-approvable factors rather than the authentication concept itself.
The recommendation is to deploy MFA universally as a baseline and prioritize phishing-resistant methods for sensitive systems. The article is syndicated from the MojoAuth blog.