Malware, short for malicious software, refers to any type of software specifically designed to disrupt, damage, or gain unauthorized access to computer systems or networks. This category of software includes viruses, worms, trojan horses, ransomware, spyware, adware, and other harmful programs. Malware can be spread through various means, such as email attachments, infected websites, or compromised software downloads, and can cause significant harm to individuals, organizations, and systems.