The term for a self-replicating program that can spread across networks is known as a worm. Unlike viruses, which require user action to spread, worms autonomously propagate themselves through network connections. They often exploit vulnerabilities in operating systems or applications, leading to significant security threats. In addition to spreading rapidly, some worms can cause damage to files or systems, making them dangerous in cyberspace. Monitoring for such threats and implementing robust cybersecurity measures is crucial for protecting network integrity.