Cybernews researchers have discovered a massive collection of nearly 10 billion passwords on a hacking forum, making it the largest password compilation to date. The file, dubbed rockyou2024.txt, was posted by a user named ObamaCare and contains an astonishing 9,948,575,739 unique plaintext passwords from various data breaches. This compilation poses a significant risk for credential stuffing attacks, where passwords from one breach are used to hack into unrelated accounts. While this isn't the first RockYou password leak, it is the largest, with a mix of old and new data breaches. Experts advise checking if your passwords are included in the file and changing them immediately to strong alternatives. It's crucial to avoid reusing passwords across multiple sites and to enable multi-factor authentication where possible to enhance security. Utilizing a password manager can help in managing and securing your online accounts effectively.