If a user's credentials are in a combo list, hackers can gain unauthorized access to personal accounts, leading to identity theft or financial loss [3, 4].

The data is usually aggregated from multiple sources, including old SQL injections, phishing campaigns, or logs from information-stealing malware [2, 5]. Risks and Security Implications

Using a password manager to generate and store distinct passwords for every service prevents a single leak from compromising multiple accounts [3, 6].

Adding a second layer of verification ensures that even if a password is leaked, the account remains inaccessible [4, 6].

Combo lists like "35k Combos.txt" serve as the primary fuel for . In these attacks, automated bots systematically attempt to log into various websites using the leaked credentials, relying on the common habit of users reusing the same password across multiple platforms [2, 3].