{
  "fix": "Microsoft Edge Dev 134.0.3081.2",
  "url": "https://patchblox.com/security/fix/windows-app/microsoft.edge.dev-134.0.3081.2",
  "summary": "Microsoft Edge Dev 134.0.3081.2, released January 22, 2025, fixes 16 CVEs in Microsoft Edge Dev. None of them is reported as exploited. Patch Radar priority: High. 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 134.0.3081.2",
  "released": "2025-01-22T00:00:00Z",
  "priority": "High",
  "priorityTier": 3,
  "priorityReason": "Closes CVE-2025-21279, high severity",
  "supported": true,
  "cveCount": 16,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.01605,
  "maxCvss": 9.6,
  "appliesTo": [
    {
      "product": "Microsoft Edge Dev",
      "productUrl": "https://patchblox.com/security/product/windows-app/microsoft-edge-dev",
      "fixedVersion": "134.0.3081.2",
      "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-2025-21279",
      "url": "https://patchblox.com/security/cve/CVE-2025-21279",
      "title": "Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.01605,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-21283",
      "url": "https://patchblox.com/security/cve/CVE-2025-21283",
      "title": "Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.01485,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-21408",
      "url": "https://patchblox.com/security/cve/CVE-2025-21408",
      "title": "Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.0132,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-21342",
      "url": "https://patchblox.com/security/cve/CVE-2025-21342",
      "title": "Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.01249,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-0999",
      "url": "https://patchblox.com/security/cve/CVE-2025-0999",
      "title": "Chromium: CVE-2025-0999 Heap buffer overflow in V8",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00634,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-1426",
      "url": "https://patchblox.com/security/cve/CVE-2025-1426",
      "title": "Chromium: CVE-2025-1006 Use after free in Network",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00593,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-1006",
      "url": "https://patchblox.com/security/cve/CVE-2025-1006",
      "title": "Chromium: CVE-2025-1426 Heap buffer overflow in GPU",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00503,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-0444",
      "url": "https://patchblox.com/security/cve/CVE-2025-0444",
      "title": "Chromium: CVE-2025-0444 Use after free in Skia",
      "priority": "High",
      "severity": "medium",
      "cvss": 9.6,
      "epss": 0.00464,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-0995",
      "url": "https://patchblox.com/security/cve/CVE-2025-0995",
      "title": "Chromium: CVE -2025-0995  Use after free in V8",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00445,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-0997",
      "url": "https://patchblox.com/security/cve/CVE-2025-0997",
      "title": "Chromium: CVE -2025-0997  Use after free in Navigation",
      "priority": "High",
      "severity": "high",
      "cvss": 8.1,
      "epss": 0.00403,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-21404",
      "url": "https://patchblox.com/security/cve/CVE-2025-21404",
      "title": "Microsoft Edge (Chromium-based) Spoofing Vulnerability",
      "priority": "Routine",
      "severity": "Low",
      "cvss": 4.3,
      "epss": 0.01079,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-21267",
      "url": "https://patchblox.com/security/cve/CVE-2025-21267",
      "title": "Microsoft Edge (Chromium-based) Spoofing Vulnerability",
      "priority": "Routine",
      "severity": "Low",
      "cvss": 4.4,
      "epss": 0.00568,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-0445",
      "url": "https://patchblox.com/security/cve/CVE-2025-0445",
      "title": "Chromium: CVE-2025-0445 Use after free in V8",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 5.4,
      "epss": 0.00388,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-0451",
      "url": "https://patchblox.com/security/cve/CVE-2025-0451",
      "title": "Chromium: CVE-2025-0451 Inappropriate implementation in Extensions API",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 6.3,
      "epss": 0.0037,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-0996",
      "url": "https://patchblox.com/security/cve/CVE-2025-0996",
      "title": "Chromium: CVE -2025-0996  Inappropriate implementation in Browser UI",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 5.4,
      "epss": 0.00356,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-21401",
      "url": "https://patchblox.com/security/cve/CVE-2025-21401",
      "title": "Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability",
      "priority": "Routine",
      "cvss": 4.5,
      "epss": 0.00322,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-10T13:56:55Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}