CVSS 3.1 Calculator

Calculate the CVSS v3.1 base score and vector for a vulnerability — runs 100% in your browser. No data is uploaded; nothing leaves your device.

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9.8Critical

Base Score

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV)

Attack Complexity (AC)

Privileges Required (PR)

User Interaction (UI)

Scope (S)

Confidentiality (C)

Integrity (I)

Availability (A)

Calculates the CVSS v3.1 Base Score using the official FIRST formula. Base metrics only (no temporal/environmental). Use it to triage and prioritize vulnerabilities. Runs entirely in your browser.

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Reach for CVSS 3.1 Calculator whenever you need to calculate the CVSS v3.1 base score and vector for a vulnerability. Security, GRC and engineering teams use it to prepare for audits, prioritise remediation and communicate risk to stakeholders — a free starting point before a formal assessment.

How to embed CVSS 3.1 Calculator on your website

Add this free tool to your own site, blog or intranet — it's 100% free to embed. Paste this snippet where you want the tool to appear; it loads a clean, self-contained version with no ads or navigation.

<iframe src="https://tooljolt.com/embed/cvss-calculator" title="CVSS 3.1 Calculator" width="100%" height="640" style="border:1px solid #e5e7eb;border-radius:12px" loading="lazy"></iframe>

About CVSS 3.1 Calculator

CVSS 3.1 Calculator is a free online security compliance tool that lets you calculate the CVSS v3.1 base score and vector for a vulnerability. It runs entirely in your browser — no sign-up, no uploads and nothing ever sent to a server — so it is fast, private and safe to use with sensitive data. Whether you are a developer, security professional, student or just curious, CVSS 3.1 Calculator gives you an instant, reliable result with zero setup.

How to use CVSS 3.1 Calculator

1Open CVSS 3.1 Calculator and work through each item or input.
2Track your status as you go.
3Export or copy your results.
4Use it to prioritise and document your security work.

Why use CVSS 3.1 Calculator?

✓100% free with no sign-up, accounts, watermarks or usage limits
✓Runs entirely in your browser — your input never leaves your device, ideal for confidential security data
✓Built on recognised standards and frameworks
✓A practical, free way to plan and track your security posture
✓Works on any device with a modern web browser, online or offline

Frequently asked questions

Is CVSS 3.1 Calculator accurate?+

CVSS 3.1 Calculator follows the published standard and calculate the CVSS v3.1 base score and vector for a vulnerability using the official methodology. It is a decision-support aid — always apply your own judgement and organisational context.

Who should use CVSS 3.1 Calculator?+

Security engineers, analysts, GRC and risk teams, and developers who need to triage, score or document vulnerabilities and security processes.

Is CVSS 3.1 Calculator free to use?+

Yes. CVSS 3.1 Calculator is 100% free with no sign-up, no account, no usage limits and no watermarks. Use it as often as you like.

Does CVSS 3.1 Calculator upload my data to a server?+

No. CVSS 3.1 Calculator runs entirely in your browser using JavaScript — nothing you type or upload ever leaves your device. That makes it safe to use with sensitive or confidential security data.