Password reuse is a significant security risk, as it allows attackers to gain access to multiple accounts using just one compromised password. To address this issue, Cloudflare has introduced a feature that automatically checks whether customers' passwords have appeared in an attacker's list. If a leaked password is detected, users will be prompted to change their password immediately. Additionally, the best way to protect any Internet account is by adding two-factor authentication (2FA), which provides comprehensive defense against credential stuffing attacks. Cloudflare encourages users to adopt unique passwords and 2FA for improved account security.