5 Ways Attackers Bypass Your 2FA — And How to Stop Them

You enabled two-factor authentication on everything. You feel secure. You should not. MFA bypass is one of the most common findings in penetration tests. In fact, attackers are routinely bypassing 2FA using techniques that have been known for years — and most organizations still have not patched the gaps. Here are five real techniques attackers use, and what you can do about each one. 1. Push Notification Fatigue (MFA Bombing) How it works: The attacker already has your password (from phishing or a breach dump). They trigger login attempts repeatedly, flooding your phone with MFA push notifications at 2 AM until you tap "Approve" just to make it stop. Real-world example: This exact technique was used in the 2022 Uber breach . The attacker spammed a contractor with push notifications, then messaged them on WhatsApp pretending to be IT support: "Just approve it, we are fixing an issue." The attacker needs: Your password + patience. How to defend: Use number matching — the user must type