Multi-Factor Authentication Fatigue - Do You Know the Risks?

MFA fatigue attacks are on the rise in 2025. With users increasingly prompted to approve logins, attackers are exploiting repetition and human error to bypass MFA entirely. In order to mitigate this risk, organisations must either fully understand the risks that are associated with this technology, or entrust a team that does.

What Is MFA Fatigue?

MFA fatigue is a social engineering technique that capitalises on a user’s tendency to become overwhelmed by repeated authentication prompts. Once attackers gain access to valid login credentials, often through phishing or data breaches, they use those credentials to flood a target’s device with nonstop MFA push notifications. The goal? To wear down the user’s caution and trick them into hitting “Approve” out of confusion or distraction. That single, reactive tap can open the door to significant consequences.

A single click can lead to:

· Business email compromise

· Data breaches

· Ransomware attacks

Modern Authentication Requires Modern Controls

To reduce risk, you need to go beyond basic MFA:

· Implement Conditional Access to restrict risky logins

· Monitor for unusual login behaviour across accounts

Synergy helps you strengthen identity security by auditing your identity protection policies, deploy smarter authentication controls, and implementing systems to prevent attacks before they escalate.