Security System Breach definition

Security System Breach means any unauthorized access to, unauthorized use or misuse of, damage, deletion, or modification to, or denial of authorized access to, a computer system within the care, custody, or control of the insured, by cyber-attacks, through any electronic means, including malware, viruses, worms, and Trojan horses, spyware and adware, zero-day attacks, hacker attacks, and denial of service attacks.