What is "credential stuffing"?

Credential stuffing is defined as a cyber attack that takes advantage of stolen username and password combinations. Once attackers acquire these credentials—often from data breaches—they automate the process of attempting to log into various websites and services, exploiting the tendency of users to reuse passwords across multiple platforms. This means that if a credential for one service is compromised, it can lead to unauthorized access to other accounts where the same credential is used.

The significance of this method lies in its efficiency and the low effort required from the attackers. They can leverage automated tools to access numerous accounts in a short period, making it a particularly prevalent threat in the cybersecurity landscape. Understanding credential stuffing emphasizes the importance of implementing strong, unique passwords for different accounts and utilizing multi-factor authentication to mitigate the risks associated with password reuse.