Multi-factor authentication (MFA) has long been considered one of the strongest defenses against unauthorized access. But attackers are adapting — and one of the fastest-growing threats in 2025 is the MFA fatigue attack.
Instead of trying to steal your password, attackers simply keep sending MFA approval requests to your phone or authenticator app until you eventually tap Approve out of frustration, confusion, or habit.
It sounds simple, but it’s incredibly effective — and small businesses are being targeted more than ever.
At CloudCore IT Solutions, we’re helping clients strengthen their authentication systems and defend against this new attack technique. Here’s what every business needs to know.
😫 What Is an MFA Fatigue Attack?
An MFA fatigue attack (also called “push bombing”) happens when:
• An attacker steals or guesses a user’s password
• They try logging in repeatedly
• The victim receives nonstop push notifications asking to approve the login
• Eventually, the victim accidentally hits Approve, or
• The attacker uses social engineering to trick the user into approving it knowingly
Once approved, the attacker has full access — email, cloud apps, files, finances, customer data, everything.
With compromised credentials widely available due to massive data breaches, MFA fatigue is becoming the go-to method for attackers trying to bypass MFA entirely.
⚠️ Why MFA Fatigue Attacks Are Increasing
There are three major reasons:
1️⃣ Stolen Credentials Are Everywhere
Billions of leaked passwords circulate online. Attackers often don’t need to hack — they just log in.
2️⃣ Push Notifications Make It Too Easy
Authenticators are designed for convenience, but that convenience creates vulnerability.
3️⃣ AI and Automation Make Attacks Scalable
Attackers now use bots to spam MFA prompts relentlessly until a user breaks down.
This technique is being used by cybercriminals, state-sponsored groups, and even automated attack tools.
🛡️ How to Protect Your Business from MFA Fatigue Attacks
✔️
1. Use Number Matching (the #1 Fix)
Microsoft, Duo, and other identity providers now support number-matching MFA, which requires users to enter a code displayed on their login screen.
This completely eliminates blind “tap to approve.”
If your MFA app doesn’t support number matching yet, CloudCore can help you enable safer alternatives.
✔️
2. Disable Push Notifications When Possible
Switch to:
• TOTP codes (like Google Authenticator)
• Physical security keys (YubiKey)
• Passkeys (passwordless authentication)
These cannot be spammed the same way push prompts can.
✔️
3. Enforce Conditional Access Rules
Block or require additional verification for:
• New devices
• Unusual locations
• Unknown IP addresses
• High-risk behavior
This adds layered protection even if a user accidentally approves a prompt.
✔️
4. Educate Employees About MFA Attacks
Everyone should know:
• Never approve unexpected login notifications
• Report repeated prompts immediately
• Treat unknown MFA requests as a security incident, not a glitch
• Understand attackers may call, text, or message pretending to be IT support
✔️
5. Monitor Failed Login Attempts
CloudCore’s monitoring tools can detect:
• Repeated password attempts
• Rapid MFA prompt cycles
• Login attempts from suspicious locations
• Compromised accounts in real time
Early detection = early containment.
🎖️ Stay Protected with CloudCore IT Solutions
MFA is still essential — but only when configured correctly. The rise of MFA fatigue attacks shows that cybersecurity is constantly evolving, and businesses must evolve with it.
At CloudCore IT Solutions, we help companies:
• Configure secure MFA policies
• Deploy conditional access rules
• Monitor identity threats 24/7
• Educate employees about modern attack techniques
• Respond quickly when accounts are targeted
As a veteran-owned business with four generations of military service, CloudCore brings discipline, vigilance, and readiness to every layer of your cybersecurity defense.
