What is one primary method used by cybercriminals to gain unauthorized access to a CCTV system?

Default passwords serve as a primary method for cybercriminals to gain unauthorized access to CCTV systems because many devices come preset with easily guessable usernames and passwords. When users neglect to change these default credentials after installation, they effectively leave their systems vulnerable. Cybercriminals can employ automated tools to scan networks for devices with default passwords, exploiting this security oversight to enter and manipulate the system.

By utilizing default passwords, attackers can often access live feeds or recorded footage, compromising both security and privacy. This method highlights the importance of robust password management practices, including setting complex passwords and updating them regularly.

Other methods like phishing, firewall bypass, and packet sniffing, while significant threats in cybersecurity, require more technical skill or additional vulnerabilities in a system to be successful compared to the direct and straightforward nature of exploiting default credentials.