{
  "fix": "Microsoft Edge Dev 137.0.3255.0",
  "url": "https://patchblox.com/security/fix/windows-app/microsoft.edge.dev-137.0.3255.0",
  "summary": "Microsoft Edge Dev 137.0.3255.0, released April 11, 2025, fixes 8 CVEs in Microsoft Edge Dev. None of them is reported as exploited. Patch Radar priority: Urgent. 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 137.0.3255.0",
  "released": "2025-04-11T00:00:00Z",
  "priority": "Urgent",
  "priorityTier": 2,
  "priorityReason": "Closes CVE-2025-4052, rated Critical",
  "supported": true,
  "cveCount": 8,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.05431,
  "maxCvss": 9.8,
  "appliesTo": [
    {
      "product": "Microsoft Edge Dev",
      "productUrl": "https://patchblox.com/security/product/windows-app/microsoft-edge-dev",
      "fixedVersion": "137.0.3255.0",
      "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-2025-4052",
      "url": "https://patchblox.com/security/cve/CVE-2025-4052",
      "title": "Chromium: CVE-2025-4052 Inappropriate implementation in DevTools",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.8,
      "epss": 0.00556,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-4609",
      "url": "https://patchblox.com/security/cve/CVE-2025-4609",
      "title": "Chromium: CVE-2025-4609 Incorrect handle provided in unspecified circumstances in Mojo",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.6,
      "epss": 0.0039,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-4372",
      "url": "https://patchblox.com/security/cve/CVE-2025-4372",
      "title": "Chromium: CVE-2025-4372 Use after free in WebAudio",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00482,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-4096",
      "url": "https://patchblox.com/security/cve/CVE-2025-4096",
      "title": "Chromium: CVE-2025-4096 Heap buffer overflow in HTML",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00454,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-4050",
      "url": "https://patchblox.com/security/cve/CVE-2025-4050",
      "title": "Chromium: CVE-2025-4050 Out of bounds memory access in DevTools",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00442,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-4664",
      "url": "https://patchblox.com/security/cve/CVE-2025-4664",
      "title": "Chromium: CVE-2025-4664 Insufficient policy enforcement in Loader",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 4.3,
      "epss": 0.05431,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-29825",
      "url": "https://patchblox.com/security/cve/CVE-2025-29825",
      "title": "Microsoft Edge (Chromium-based) Spoofing Vulnerability",
      "priority": "Routine",
      "severity": "Low",
      "cvss": 6.5,
      "epss": 0.0089,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-4051",
      "url": "https://patchblox.com/security/cve/CVE-2025-4051",
      "title": "Chromium: CVE-2025-4051 Insufficient data validation in DevTools",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 6.3,
      "epss": 0.00284,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-10T07:50:38Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}