Definition
A Vulnerability is a weakness or imperfection in a system, process, configuration or organisation that may be exploited to compromise security.
Human Explanation
A Vulnerability does not cause a problem by itself. It becomes dangerous when a Threat can exploit it.
Why it Matters
Most security incidents are possible because an undetected or unresolved Vulnerability already existed.
Conceptual Boundary
A Vulnerability is neither an Attack nor a Threat. It is a condition that enables an Attack to succeed.
Practical Perspective
Not every Vulnerability requires immediate action. Priority depends on Risk and exploitability.