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Tools / Vulnerabilities

CVSS 4.0 and 3.1 calculator

Score a vulnerability with CVSS 4.0 or 3.1, explained in plain words, or paste a vector to see what it means.

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Good to know

  • CVSS measures severity, not risk. A critical bug on a system that is not exposed can wait behind a medium one that is.
  • CVSS 4.0 splits impact into the vulnerable system and the systems beyond it, and adds Attack Requirements; most new advisories publish both 4.0 and 3.1 vectors.
  • Share the vector, not just the number: two 7.5s can be very different problems.