{
  "fix": "KB5133965",
  "url": "https://patchblox.com/security/fix/microsoft/kb5133965",
  "summary": "KB5133965, released October 25, 2026, fixes 3 CVEs across 4 products. One of them is being exploited (CVE-2026-111497); 1 on CISA KEV. Patch Radar priority: Patch now.",
  "platform": "microsoft",
  "type": "kb",
  "releaseKind": "Security",
  "title": "October 2026 security update",
  "released": "2026-10-25T07:00:00Z",
  "priority": "Patch now",
  "priorityTier": 1,
  "priorityReason": "Closes CVE-2026-111497, exploited (CISA KEV)",
  "supported": true,
  "cveCount": 3,
  "exploitedCveCount": 1,
  "kevCveCount": 1,
  "ransomwareCveCount": 0,
  "maxEpss": 0.82641,
  "maxCvss": 9.8,
  "vendorAdvisory": "https://support.microsoft.com/help/5133965",
  "appliesTo": [
    {
      "product": ".NET 9.0 installed on Linux",
      "productUrl": "https://patchblox.com/security/product/microsoft/net-9.0-installed-on-linux",
      "fixedVersion": "",
      "supported": true
    },
    {
      "product": ".NET 9.0 installed on Mac OS",
      "productUrl": "https://patchblox.com/security/product/microsoft/net-9.0-installed-on-mac-os",
      "fixedVersion": "",
      "supported": true
    },
    {
      "product": ".NET 9.0 installed on Windows",
      "productUrl": "https://patchblox.com/security/product/microsoft/net-9.0-installed-on-windows",
      "fixedVersion": "",
      "supported": true
    },
    {
      "product": "ASP.NET Core runtime and targeting-pack Linux tarballs (Microsoft-published)",
      "productUrl": "https://patchblox.com/security/product/microsoft/asp.net-core-runtime-and-targeting-pack-linux-tarballs-microsoft-published",
      "fixedVersion": "",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2026-111497",
      "url": "https://patchblox.com/security/cve/CVE-2026-111497",
      "title": "Google: CVE-2026-111497 Buffer overflow vulnerability in the Brotli decoder",
      "component": ".NET",
      "priority": "Patch now",
      "severity": "Important",
      "cvss": 9.8,
      "epss": 0.82641,
      "kev": true,
      "ransomware": false,
      "exploited": true,
      "disclosed": true
    },
    {
      "cveId": "CVE-2026-70197",
      "url": "https://patchblox.com/security/cve/CVE-2026-70197",
      "title": ".NET and Visual Studio Remote Code Execution Vulnerability",
      "component": ".NET",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.1,
      "epss": 0.00788,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-114148",
      "url": "https://patchblox.com/security/cve/CVE-2026-114148",
      "title": "ASP.NET Core Elevation of Privilege Vulnerability",
      "component": "ASP.NET Core",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.1,
      "epss": 0.00355,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-07T06:34:28Z"
}