Many people assume an account can only be hacked after clicking a phishing link or entering a password on a fake site. In reality, cybercriminals now have various other methods to take over a victim’s account. One of them is cookie theft, a technique that exploits login session data so the attacker can access an account without ever needing to know the password.
A cookie is data stored by a browser to keep a login session active. If that data is stolen through malware, malicious browser extensions, an infected device, or other security gaps, the attacker can use it to impersonate the account owner. In some cases, this method can even bypass the need to log in again, because the system treats the session as still valid.
Methods like this often leave victims confused, since they feel they never clicked a suspicious link or entered their credentials on a fake site. Suddenly a login notification appears from an unfamiliar device or location, even though the account is rarely used. That said, it’s worth noting that not every case of unauthorized access is caused by cookie theft, so further investigation is still needed to confirm the exact cause.
To reduce the risk, users are advised to always keep their operating system and browser updated, avoid installing apps or extensions from untrusted sources, and regularly scan their devices with security software. If suspicious activity appears, immediately log out of all sessions, change the password, and enable two-factor authentication (2FA) to keep the account protected against evolving hacking techniques.