GLOSSARY / Computer Worm

What is Computer Worm?

Self-replicating malware that spreads across networks without user interaction.

Unlike viruses, worms do not need to attach to a host file — they exploit vulnerabilities to copy themselves to new systems automatically. WannaCry and Conficker caused global damage this way.

Worms can saturate networks and deliver additional payloads like ransomware.

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Related terms

Malware Ransomware

Part of the Ciphers Security glossary. Free reference for analysts, defenders & learners.