Vulnerability Risk Calculator - help me to understand this logic please.

Don Dom
Tera Contributor

Hello.

Can any body explain to me please - as simple as possible - how the calculation is done?

RISK = 60. Why?

DonDom_1-1760533771928.png

EPPS score:

DonDom_2-1760533807681.png

Modified Severity:

DonDom_3-1760533844740.png

 



I have default risk calculator:

DonDom_0-1760533732605.png

Please advise.

BR
Dom

1 REPLY 1

Ranjane_Omkar
Kilo Sage

Hello @Don Dom

 

This risk score is calculated based on the weights you define in the calculator. According to your screenshot, the calculation currently considers only two parameters: Vulnerability Severity (80% weight) and Vulnerability Exploit Exists (20% weight). To see how this weighting affects your Risk Score and Risk Rating, please refer to the scenario in the "Risk Score Criteria" section. If you want to include other parameters, such as the EPSS Score, you will need to adjust the weights accordingly.

Screenshot 2025-10-22 184601.png

The final risk score is calculated using the following formula: (Vulnerability Severity Score * 0.80) + (Vulnerability Exploit Exists Score * 0.20)

The resulting output is detailed as follows

Vulnerability SeverityExploit ExistsCalculationFinal Risk Score
CriticalYes(100 * 0.80) + (100 * 0.20)100
CriticalNo(100 * 0.80) + (0 * 0.20)80
HighYes(75 * 0.80) + (100 * 0.20)80
HighNo(75 * 0.80) + (0 * 0.20)60
MediumYes(50 * 0.80) + (100 * 0.20)60
MediumNo(50 * 0.80) + (0 * 0.20)40
LowYes(25 * 0.80) + (100 * 0.20)40
LowNo(25 * 0.80) + (0 * 0.20)20 
NoneYes(0 * 0.80) + (100 * 0.20)20
NoneNo(0 * 0.80) + (0 * 0.20)0

 

Read the below documents carefully.

1) Risk score calculation example for Vulnerability Response 

2) Vulnerability Response calculators and vulnerability calculator rules 

 

Regards,

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