{
  "fix": "Microsoft Edge Dev 138.0.3309.1",
  "url": "https://patchblox.com/security/fix/windows-app/microsoft.edge.dev-138.0.3309.1",
  "summary": "Microsoft Edge Dev 138.0.3309.1, released May 14, 2025, fixes 14 CVEs in Microsoft Edge Dev. One of them is being exploited (CVE-2025-5419); 1 on CISA KEV. Patch Radar priority: Patch now. The latest Microsoft Edge Dev is 159.0.4378.0, which also fixes every one of these CVEs.",
  "platform": "windows-app",
  "type": "app-version",
  "title": "Microsoft Edge Dev 138.0.3309.1",
  "released": "2025-05-14T00:00:00Z",
  "priority": "Patch now",
  "priorityTier": 1,
  "priorityReason": "Closes CVE-2025-5419, exploited (CISA KEV)",
  "supported": true,
  "cveCount": 14,
  "exploitedCveCount": 1,
  "kevCveCount": 1,
  "ransomwareCveCount": 0,
  "maxEpss": 0.1278,
  "maxCvss": 8.8,
  "appliesTo": [
    {
      "product": "Microsoft Edge Dev",
      "productUrl": "https://patchblox.com/security/product/windows-app/microsoft-edge-dev",
      "fixedVersion": "138.0.3309.1",
      "latestVersion": "159.0.4378.0",
      "supported": true
    }
  ],
  "supersededBy": {
    "product": "Microsoft Edge Dev",
    "latestVersion": "159.0.4378.0",
    "productUrl": "https://patchblox.com/security/product/windows-app/microsoft-edge-dev"
  },
  "cves": [
    {
      "cveId": "CVE-2025-5419",
      "url": "https://patchblox.com/security/cve/CVE-2025-5419",
      "title": "Chromium: CVE-2025-5419 Out of bounds read and write in V8",
      "priority": "Patch now",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.07553,
      "kev": true,
      "ransomware": false,
      "exploited": true,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-5959",
      "url": "https://patchblox.com/security/cve/CVE-2025-5959",
      "title": "Chromium: CVE-2025-5959 Type Confusion in V8",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.1278,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-6191",
      "url": "https://patchblox.com/security/cve/CVE-2025-6191",
      "title": "Chromium: CVE-2025-6191 Integer overflow in V8",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.11585,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-5063",
      "url": "https://patchblox.com/security/cve/CVE-2025-5063",
      "title": "Chromium: CVE-2025-5063 Use after free in Compositing",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.0367,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-5068",
      "url": "https://patchblox.com/security/cve/CVE-2025-5068",
      "title": "Chromium: CVE-2025-5068 Use after free in Blink",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.03473,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-5280",
      "url": "https://patchblox.com/security/cve/CVE-2025-5280",
      "title": "Chromium: CVE-2025-5280 Out of bounds write in V8",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.02914,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-5283",
      "url": "https://patchblox.com/security/cve/CVE-2025-5283",
      "title": "Chromium: CVE-2025-5283 Use after free in libvpx",
      "priority": "High",
      "severity": "Medium",
      "cvss": 8.8,
      "epss": 0.00642,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-6192",
      "url": "https://patchblox.com/security/cve/CVE-2025-6192",
      "title": "Chromium: CVE-2025-6192 Use after free in Profiler",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00447,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-5958",
      "url": "https://patchblox.com/security/cve/CVE-2025-5958",
      "title": "Chromium: CVE-2025-5958 Use after free in Media",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00385,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-5065",
      "url": "https://patchblox.com/security/cve/CVE-2025-5065",
      "title": "Chromium: CVE-2025-5065 Inappropriate implementation in FileSystemAccess API",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 6.5,
      "epss": 0.00405,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-5066",
      "url": "https://patchblox.com/security/cve/CVE-2025-5066",
      "title": "Chromium: CVE-2025-5066 Inappropriate implementation in Messages",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 6.5,
      "epss": 0.00405,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-5067",
      "url": "https://patchblox.com/security/cve/CVE-2025-5067",
      "title": "Chromium: CVE-2025-5067 Inappropriate implementation in Tab Strip",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 5.4,
      "epss": 0.00362,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-5064",
      "url": "https://patchblox.com/security/cve/CVE-2025-5064",
      "title": "Chromium: CVE-2025-5064 Inappropriate implementation in Background Fetch API",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 5.4,
      "epss": 0.00323,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-5281",
      "url": "https://patchblox.com/security/cve/CVE-2025-5281",
      "title": "Chromium: CVE-2025-5281 Inappropriate implementation in BFCache",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 5.4,
      "epss": 0.00241,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-10T20:03:11Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}