In computing, a worm is a type of malicious software (malware) that replicates itself and spreads to other computers or networks without the need for human interaction. Unlike viruses, worms do not require a host program to attach themselves to, and can propagate independently through computer networks, usually by exploiting vulnerabilities in operating systems or other software.

Once a worm infects a computer, it can perform various malicious actions, such as stealing sensitive data, sending spam emails, launching distributed denial-of-service (DDoS) attacks, or installing additional malware. Worms can also consume a large amount of network bandwidth, causing network slowdowns or outages.

To protect against worms, it’s important to keep software up-to-date with the latest security patches, use antivirus software, and avoid downloading or opening suspicious attachments or links in emails.

(Ed: written by ChatGPT; verified by jrivett.)