These THREE terms are interlinked but they are very DIFFERENT from each other: 

Vulnerability: If your security program has a breach or weakness then different threats can further exploit the program and thus hack into your system to access DATA that is stored securely. 

Risk: If your system is not secure enough and has the chances of getting damaged or destruction along with loss of data when a threat exploits the vulnerability, it’s under huge risk. 

Threat: Something that is necessary for exploiting the vulnerability EITHER knowingly or by accident in order to damage or DESTROY personal and official data.

These three terms are interlinked but they are very different from each other: 

Vulnerability: If your security program has a breach or weakness then different threats can further exploit the program and thus hack into your system to access data that is stored securely. 

Risk: If your system is not secure enough and has the chances of getting damaged or destruction along with loss of data when a threat exploits the vulnerability, it’s under huge risk. 

Threat: Something that is necessary for exploiting the vulnerability either knowingly or by accident in order to damage or destroy personal and official data.