the.com/credential stuffing
hackers don't guess your password, they just reuse the one you already leaked.
means an attack where stolen username-password pairs from one breach get auto-tried on other sites, banking on people reusing logins.
from emerged as a named threat around 2014 once breach dumps got so massive that bots, not humans, became the ones doing the logging in.
success rateoften under 1 percent, but breaches involve millions
scale factorbotnets test thousands of logins per second
root causepassword reuse across unrelated accounts
defenseunique passwords plus two-factor auth mostly neutralize it