Glossary term
Malware
Software designed to harm a device, steal information or let someone else control it.
Reviewed 15 August 2026
Definition
A general term for software created to harm a device, steal information, or give someone unauthorised access or control.
In plain English
It can arrive through a suspicious download, an email attachment, a fake update prompt or a compromised website, and it doesn't always announce itself with obvious symptoms.
Why it matters
Knowing the term helps you take a warning seriously without needing to understand exactly how the software works.