Vulnerability Risk Score Calculator

ANA›Life Services Authority›National Calculator Authority›Vulnerability Risk Score Calculator

.calc-container { max-width: 640px; margin: 2rem 0; padding: 1.5rem; background: #fff; border: 1px solid #ddd; border-radius: 8px; box-shadow: 0 1px 3px rgba(0,0,0,0.06); font-family: system-ui, -apple-system, sans-serif; } .calc-container h3 { font-family: Georgia, serif; font-size: 1.15rem; color: #1a1a1a; margin-bottom: 1rem; padding-bottom: 0.5rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-row { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.75rem; flex-wrap: wrap; } .calc-row label { min-width: 160px; font-size: 0.9rem; color: #333; font-weight: 500; } .calc-row input[type="number"], .calc-row select { flex: 1; min-width: 120px; max-width: 200px; padding: 0.5rem 0.6rem; border: 1px solid #ccc; border-radius: 4px; font-size: 0.9rem; font-family: system-ui, sans-serif; color: #1a1a1a; background: #fafaf8; } .calc-row input:focus, .calc-row select:focus { outline: none; border-color: var(--ac, #3d5a80); box-shadow: 0 0 0 2px rgba(26,74,138,0.12); } .calc-row .unit { font-size: 0.82rem; color: #888; min-width: 30px; } .calc-btn { display: inline-block; margin-top: 0.5rem; padding: 0.55rem 1.5rem; background: var(--ac, #3d5a80); color: #fff; border: none; border-radius: 4px; font-size: 0.9rem; font-weight: 600; cursor: pointer; font-family: system-ui, sans-serif; } .calc-btn:hover { opacity: 0.9; } .calc-result { margin-top: 1.25rem; padding: 1rem 1.25rem; background: #f0f6fc; border-left: 3px solid var(--ac, #3d5a80); border-radius: 0 6px 6px 0; display: none; } .calc-result.visible { display: block; } .calc-result-label { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: #666; margin-bottom: 0.25rem; } .calc-result-value { font-size: 1.6rem; font-weight: 700; color: var(--ac, #3d5a80); } .calc-result-detail { font-size: 0.85rem; color: #555; margin-top: 0.5rem; line-height: 1.5; } .calc-note { margin-top: 1rem; font-size: 0.8rem; color: #888; font-style: italic; } .calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; margin-top: 0.75rem; } .calc-grid-item { padding: 0.6rem 0.8rem; background: #f8f9fa; border-radius: 4px; border: 1px solid #eee; } .calc-grid-item .label { font-size: 0.75rem; color: #888; text-transform: uppercase; letter-spacing: 0.04em; } .calc-grid-item .value { font-size: 1.1rem; font-weight: 600; color: #1a1a1a; } @media (max-width: 720px) { .calc-row { flex-direction: column; align-items: flex-start; gap: 0.3rem; } .calc-row label { min-width: auto; } .calc-row input[type="number"], .calc-row select { max-width: 100%; width: 100%; } .calc-grid { grid-template-columns: 1fr; } } .calc-chart { margin: 1rem 0; text-align: center; } .calc-chart svg { max-width: 100%; height: auto; } .calc-chart-legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.6rem 1.2rem; margin-top: 0.6rem; font-size: 0.8rem; color: #555; } .calc-chart-legend span { display: inline-flex; align-items: center; gap: 0.3rem; } .calc-chart-legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; font-style: normal; } .calc-related { max-width: 640px; margin: 2rem 0 1rem; padding: 1.25rem 1.5rem; background: #f8f9fa; border: 1px solid #e8e8e8; border-radius: 8px; } .calc-related h3 { font-family: Georgia, serif; font-size: 1rem; color: #1a1a1a; margin: 0 0 0.75rem; padding-bottom: 0.4rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-related-list { list-style: none; padding: 0; margin: 0 0 0.75rem; display: grid; grid-template-columns: 1fr 1fr; gap: 0.4rem 1.5rem; } .calc-related-list li a { font-size: 0.88rem; color: var(--ac, #3d5a80); text-decoration: none; } .calc-related-list li a:hover { text-decoration: underline; } .calc-browse-all { margin: 0.5rem 0 0; font-size: 0.9rem; font-weight: 600; } .calc-browse-all a { color: var(--ac, #3d5a80); text-decoration: none; } .calc-browse-all a:hover { text-decoration: underline; } @media (max-width: 720px) { .calc-related-list { grid-template-columns: 1fr; } }

Vulnerability Risk Score Calculator

Calculate a composite vulnerability risk score (0–10) based on CVSS v3-inspired metrics covering exploitability and impact dimensions.

Attack Vector

Network (AV:N) Adjacent Network (AV:A) Local (AV:L) Physical (AV:P)

Attack Complexity

Low (AC:L) High (AC:H)

Privileges Required

None (PR:N) Low (PR:L) — Unchanged Scope Low (PR:L) — Changed Scope High (PR:H) — Unchanged Scope High (PR:H) — Changed Scope

User Interaction

None (UI:N) Required (UI:R)

Scope

Unchanged (S:U) Changed (S:C)

Confidentiality Impact

None (C:N) Low (C:L) High (C:H)

Integrity Impact

None (I:N) Low (I:L) High (I:H)

Availability Impact

None (A:N) Low (A:L) High (A:H)

Exploit Code Maturity (Temporal)

Not Defined / High Functional Proof-of-Concept Unproven

Remediation Level (Temporal)

Not Defined / Unavailable Workaround Temporary Fix Official Fix

Report Confidence (Temporal)

Not Defined / Confirmed Reasonable Unknown

Asset Value / Environmental Weight (1–3)

1 — Low 2 — Medium 3 — High

Calculate Risk Score

function vulCalc() { var errEl = document.getElementById('vul-error'); errEl.style.display = 'none';

var AV = parseFloat(document.getElementById('vul-attack-vector').value); var AC = parseFloat(document.getElementById('vul-attack-complexity').value); var PR = parseFloat(document.getElementById('vul-privileges').value); var UI = parseFloat(document.getElementById('vul-user-interaction').value); var scope = document.getElementById('vul-scope').value; var CI = parseFloat(document.getElementById('vul-conf-impact').value); var II = parseFloat(document.getElementById('vul-integ-impact').value); var AI = parseFloat(document.getElementById('vul-avail-impact').value); var E = parseFloat(document.getElementById('vul-exploit-maturity').value); var RL = parseFloat(document.getElementById('vul-remediation').value); var RC = parseFloat(document.getElementById('vul-report-confidence').value); var AW = parseFloat(document.getElementById('vul-asset-value').value);

// --- ISCBase --- var ISCBase = 1 - (1 - CI) * (1 - II) * (1 - AI);

// --- Impact Sub Score (ISS) --- var ISS; if (scope === 'unchanged') { ISS = 6.42 * ISCBase; } else { ISS = 7.52 * (ISCBase - 0.029) - 3.25 * Math.pow(ISCBase - 0.02, 15); }

// --- Exploitability Sub Score (ESS) --- var ESS = 8.22 * AV * AC * PR * UI;

// --- Base Score --- var baseScore; if (ISCBase ' + '' + finalScore.toFixed(1) + ' / 10' + '' + severity + '' + '' + '' + 'ISC Base (ISCBase)' + ISCBase.toFixed(4) + '' + 'Impact Sub Score (ISS)' + ISS.toFixed(4) + '' + 'Exploitability Sub Score (ESS)' + ESS.toFixed(4) + '' + 'Base Score' + baseScore.toFixed(1) + '' + 'Temporal Score' + temporalScore.toFixed(1) + '' + 'Final Environmental Score' + finalScore.toFixed(1) + '' + ''; }

#### Formulas

1. ISC Base: ISCBase = 1 − (1 − C) × (1 − I) × (1 − A)

2. Impact Sub Score (ISS): Unchanged Scope: ISS = 6.42 × ISCBase Changed Scope: ISS = 7.52 × (ISCBase − 0.029) − 3.25 × (ISCBase − 0.02)^15

3. Exploitability Sub Score (ESS): ESS = 8.22 × AV × AC × PR × UI

4. Base Score: Unchanged: BaseScore = Roundup(min(ISS + ESS, 10)) Changed: BaseScore = Roundup(min(1.08 × (ISS + ESS), 10))

5. Temporal Score: TemporalScore = Roundup(BaseScore × E × RL × RC)

6. Final Environmental Score: FinalScore = min(TemporalScore × AssetWeight, 10)

Severity Ratings: None (0.0) | Low (0.1–3.9) | Medium (4.0–6.9) | High (7.0–8.9) | Critical (9.0–10.0)

#### Assumptions & References

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References

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