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CVSS Base Vector Decoder

Decodes a CVSS base vector string and estimates the numerical score from average weight.

resultado

What this decoder actually computes

The name says vector string decoder, so it is fair to arrive expecting a text box for CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. There is none. What you get instead is five numeric inputs: four for the exploitability metrics on a small ordinal scale of the page's own making, plus one field where Confidentiality, Integrity and Availability collapse into a single total from 0 to 12.

The arithmetic is a house index, not CVSS. It averages AV, AC, PR and UI over 16, takes the C+I+A total over 12, blends the two halves evenly and scales to 10. The output stays between 0 and 10 and rises with severity, but it reproduces neither the 8.22 and 6.42 coefficients nor the multiplicative structure of the standard. Matching an NVD score is coincidence rather than design.

Treat it as rough triage when you only need to rank a handful of findings against each other, or as a teaching aid for seeing which metrics push severity up. Anything that ends up in a report, a remediation ticket or a patching SLA should come from the CVSS 3.1 calculator on this site or from the official FIRST calculator, with real metric weights. Everything is computed locally in the browser.

Frequently asked questions

So it decodes nothing?
It parses no text. You translate each letter of the vector yourself into the numeric code printed in the field label (N=4, A=3, L=2, P=1, and so on).
How do I fill the C+I+A field?
Add the three impacts on the same 0 to 4 scale the rest of the page uses. The field accepts 0 to 12, so High/High/High would be 12.
Does the number match the official CVSS score?
Rarely. Both rise in the same direction, but the formulas differ. Read the value here as a relative estimate.

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The results provided by this tool are for general informational and educational purposes only and do not constitute professional, financial, medical, legal, tax or accounting advice. Always confirm important decisions with a qualified professional and official sources.