In cybersecurity, 'spread' refers to the process by which malicious software, such as viruses, worms, or ransomware, propagates across computer systems and networks. This can occur through various vectors, including email attachments, infected websites, removable media, or network vulnerabilities. The speed and method of spread are critical factors in determining the potential impact and reach of a cyberattack. Understanding how threats spread helps organizations develop effective containment and mitigation strategies, such as segmentation, patch management, and user education. Monitoring for abnormal spreading behavior is a key aspect of threat detection and response within cybersecurity operations.