Cybersecurity

Malware

Definition

Malware, short for malicious software, is any software intentionally designed to cause disruption to a computer, server, client, or computer network, leak private information, gain unauthorized access to information or systems, or deprive users access to their information.

Why It Matters

Malware is the umbrella term for most cyber threats. Understanding the different types of malware is the first step in protecting against them.

Contextual Example

A user downloads a seemingly harmless free application, but it secretly contains ransomware, a type of malware that encrypts their files and demands a payment for their release.

Common Misunderstandings

  • Malware is a broad category that includes viruses, worms, trojans, ransomware, spyware, and more.
  • It can be spread through email attachments, malicious downloads, or by exploiting software vulnerabilities.

Related Terms

Last Updated: December 17, 2025