An authentication weakness is a flaw in how a system verifies a user or account. Examples include weak or default passwords, missing multi-factor authentication, poor password-reset controls, or errors in session and account management. Such weaknesses can let an attacker gain access without authorization or keep access after a legitimate user changes settings.
In cyber security, weak authentication can expose internet-connected devices such as cameras and video recorders to account takeover, unauthorized viewing, or configuration changes. Defenders should replace default credentials, use strong unique passwords and multi-factor authentication where available, restrict remote access, and review account and configuration changes. A weakness may increase risk, but it should not be treated as the confirmed cause of a particular intrusion unless evidence supports that conclusion.