{
  "fix": "Microsoft Edge WebView2 Runtime 138.0.3351.65",
  "url": "https://patchblox.com/security/fix/windows-app/microsoft.edgewebview2runtime-138.0.3351.65",
  "summary": "Microsoft Edge WebView2 Runtime 138.0.3351.65, released July 1, 2025, fixes 2 CVEs in Microsoft Edge WebView2 Runtime. One of them is being exploited (CVE-2025-6554); 1 on CISA KEV. Patch Radar priority: Patch now. The latest Microsoft Edge WebView2 Runtime is 157.0.4341.42, which also fixes every one of these CVEs.",
  "platform": "windows-app",
  "type": "app-version",
  "title": "Microsoft Edge WebView2 Runtime 138.0.3351.65",
  "released": "2025-07-01T00:00:00Z",
  "priority": "Patch now",
  "priorityTier": 1,
  "priorityReason": "Closes CVE-2025-6554, exploited (CISA KEV)",
  "supported": true,
  "cveCount": 2,
  "exploitedCveCount": 1,
  "kevCveCount": 1,
  "ransomwareCveCount": 0,
  "maxEpss": 0.14142,
  "maxCvss": 8.8,
  "appliesTo": [
    {
      "product": "Microsoft Edge WebView2 Runtime",
      "productUrl": "https://patchblox.com/security/product/windows-app/microsoft-edge-webview2-runtime",
      "fixedVersion": "138.0.3351.65",
      "latestVersion": "157.0.4341.42",
      "supported": true
    }
  ],
  "supersededBy": {
    "product": "Microsoft Edge WebView2 Runtime",
    "latestVersion": "157.0.4341.42",
    "productUrl": "https://patchblox.com/security/product/windows-app/microsoft-edge-webview2-runtime"
  },
  "cves": [
    {
      "cveId": "CVE-2025-6554",
      "url": "https://patchblox.com/security/cve/CVE-2025-6554",
      "title": "Chromium: CVE-2025-6554 Type Confusion in V8",
      "priority": "Patch now",
      "severity": "high",
      "cvss": 8.1,
      "epss": 0.14142,
      "kev": true,
      "ransomware": false,
      "exploited": true,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-49713",
      "url": "https://patchblox.com/security/cve/CVE-2025-49713",
      "title": "Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.00809,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-11T07:45:43Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}