A combo list (Compilation of Multiple Breaches) is a text file that aggregates millions or billions of email and password pairs.
If you have received a notification that your information is on a combo list or if you have encountered this file: Download 548K COMBO LIST UPDATE zip
: They are primarily used by cybercriminals for credential stuffing attacks , where automated tools try these combinations across thousands of websites to gain unauthorized access to accounts where users have reused passwords. A combo list (Compilation of Multiple Breaches) is
: These files are often formatted simply as email:password . While some lists contain old or "recycled" data, modern versions may include fresh credentials harvested directly from infostealer malware like RedLine or Lumma. While some lists contain old or "recycled" data,
: Turn on Multi-Factor Authentication (MFA) on all sensitive accounts (email, banking, social media). This provides a critical second layer of defense even if an attacker has your password.
: Avoid downloading any "combo list" .zip or .exe files, as they are high-risk sources of malware.
: Use services like Have I Been Pwned or Malwarebytes Digital Footprint Scan to check if your email has appeared in recent data leaks. Learn more about Password Combo List notification