Security can seem confusing, especially when different terms are used interchangeably. Understanding the difference between a threat, a vulnerability and a risk is the first step to making sense of your own security posture.
A Threat
A threat is anything that has the potential to cause harm — a hacker, a piece of malware, or even a natural disaster that could take your systems offline. Threats exist whether or not your business is prepared for them.
A Vulnerability
A vulnerability is a weakness that a threat could exploit — an unpatched server, a weak password policy, or an untrained employee who might click a phishing link.
A Risk
Risk is what happens when a threat meets a vulnerability. It is usually measured as a combination of how likely an incident is, and how much damage it would cause if it happened.
Why This Matters
Understanding these three terms helps prioritise security spend correctly. You cannot eliminate every threat, but you can close vulnerabilities and manage risk down to an acceptable level.
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