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Threat Intelligence

Expert analysis of cyber threats, security vulnerabilities, malware campaigns, and threat actor tactics to help organizations anticipate risks and improve their security posture.

Microsoft 365 Password Spraying Attack How 81 Million Login Attempts Bypassed MFA

Microsoft 365 Password Spraying Attack: How 81 Million Login Attempts Bypassed MFA

Threat Intelligence /

A massive password spraying attack targeting Microsoft 365 and Azure exposed how legacy authentication flows like ROPC can bypass MFA. With 81 million login attempts in just two weeks, attackers exploited common Conditional Access misconfigurations to compromise real accounts. This breakdown explains what happened, why MFA failed and the exact steps organizations should take to close these identity security gaps.

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