Why Multi-Factor Authentication Alone Isn’t Enough Anymore

Multi-factor authentication (MFA) has become a standard security requirement for business accounts. While it’s still a vital defense, recent attacks show that MFA alone can be bypassed by determined attackers. Understanding these risks and taking extra steps can help your organization stay protected.

Why It Matters to Small Businesses

Small businesses and nonprofits are frequent targets for phishing and account compromise. Many believe that enabling MFA is enough to keep accounts safe. However, attackers are now using more sophisticated methods to get around MFA, such as adversary-in-the-middle (AITM) phishing, which can steal login session tokens even after a legitimate MFA check. This makes it important to go beyond basic MFA and adopt additional safeguards.

How Attackers Bypass MFA

Traditionally, MFA protected accounts by requiring something you know (like a password) and something you have (like a code from your phone). Attackers responded by creating fake login pages that look identical to real ones. When you enter your credentials and MFA code on the fake page, the attacker immediately uses them on the real site, gaining access to your account.

Some attackers go a step further by capturing session tokens. After you log in with MFA, your browser receives a session token that keeps you authenticated. If an attacker steals this token—often through a fake login page that acts as a “middleman”—they can access your account without needing your password or MFA code again. This technique is becoming more common and effective.

Recommended Steps to Strengthen Account Security

• Use phishing-resistant MFA methods: Whenever possible, use security keys, passkeys, or device-based authentication that cannot be easily phished or intercepted.
• Double-check login pages: Always verify that the web address is correct before entering credentials. Look for signs of a secure connection (such as the lock icon) and be cautious with links received by email or text.
• Report suspicious authentication prompts: If you receive unexpected MFA requests or login alerts, report them to your IT team immediately. This can be a sign that someone is trying to access your account.
• Educate your team: Regular training on how to spot phishing attempts and suspicious login activity helps everyone stay vigilant.
• Review account activity: Periodically check for unfamiliar logins or devices connected to your accounts, and sign out of sessions you don’t recognize.

How NIS Helps Manage and Reduce the Risk

NIS helps clients strengthen their account security by recommending phishing-resistant MFA options, monitoring for suspicious activity, and providing user training on safe login practices. We stay current with the latest threats and help ensure your systems and staff are prepared for evolving attack methods. If you have questions about your organization’s account security, our team is here to help you assess and improve your defenses.

Staying ahead of attackers means going beyond the basics. With the right tools and awareness, you can make it much harder for anyone to compromise your accounts.