BeCuriouzLearn something new every day
One leaked password can open ten of your accounts
💡 Reusing passwords lets one site's breach cascade into all your accounts — unique passwords and MFA break the chain.
When a website gets breached, attackers rarely stop at that one site. They take the leaked list of emails and passwords and quietly try the same combinations on banks, email providers, and shopping sites. This attack is called credential stuffing, and it works because most people reuse the same password across many accounts. The hackers don't need to 'crack' anything — they're simply reusing a key you already handed out.
It's automated and cheap. Bots can test millions of stolen email-and-password pairs across hundreds of sites in hours. Even if only 1% of the pairs still work, that's thousands of hijacked accounts from a single leaked database.
The defenses are simple. A unique password for every account means a leak at one site can't unlock the others, and a password manager makes that practical. Turning on multi-factor authentication adds a second lock that a stolen password alone can't open.