{
  "cveId": "CVE-2026-108398",
  "url": "https://patchblox.com/security/cve/CVE-2026-108398",
  "summary": "CVE-2026-108398 is fixed in 24 products on 1 platform, first by KB5126868, released October 13, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": ".NET Framework Security Feature Bypass Vulnerability",
  "description": "\u003Cp\u003EUntrusted search path in .NET Framework allows an authorized attacker to bypass a security feature locally.\u003C/p\u003E",
  "published": "2026-10-13T07:00:00Z",
  "severity": "Important",
  "cvss": 8.8,
  "cwe": "Untrusted Search Path",
  "epss": 0.00779,
  "epssPercentile": 0.56067,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": true,
  "exploitabilityAssessment": "Exploitation Less Likely",
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-108398",
  "fixes": [
    {
      "platform": "microsoft",
      "product": "Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 version 1607",
      "fixedVersion": "14393.9612",
      "fix": "KB5126868",
      "url": "https://patchblox.com/security/fix/microsoft/kb5126868",
      "released": "2026-10-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016",
      "fixedVersion": "14393.9612",
      "fix": "KB5126868",
      "url": "https://patchblox.com/security/fix/microsoft/kb5126868",
      "released": "2026-10-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2019",
      "fixedVersion": "",
      "fix": "KB5127666",
      "url": "https://patchblox.com/security/fix/microsoft/kb5127666",
      "released": "2026-10-13T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 version 1809",
      "fixedVersion": "",
      "fix": "KB5127666",
      "url": "https://patchblox.com/security/fix/microsoft/kb5127666",
      "released": "2026-10-13T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 version 1809",
      "fixedVersion": "",
      "fix": "KB5127685",
      "url": "https://patchblox.com/security/fix/microsoft/kb5127685",
      "released": "2026-10-13T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 version 21H2",
      "fixedVersion": "",
      "fix": "KB5127683",
      "url": "https://patchblox.com/security/fix/microsoft/kb5127683",
      "released": "2026-10-13T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 version 22H2",
      "fixedVersion": "",
      "fix": "KB5127683",
      "url": "https://patchblox.com/security/fix/microsoft/kb5127683",
      "released": "2026-10-13T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019",
      "fixedVersion": "",
      "fix": "KB5127685",
      "url": "https://patchblox.com/security/fix/microsoft/kb5127685",
      "released": "2026-10-13T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022",
      "fixedVersion": "",
      "fix": "KB5127687",
      "url": "https://patchblox.com/security/fix/microsoft/kb5127687",
      "released": "2026-10-13T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 version 21H2",
      "fixedVersion": "",
      "fix": "KB5127689",
      "url": "https://patchblox.com/security/fix/microsoft/kb5127689",
      "released": "2026-10-13T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 version 22H2",
      "fixedVersion": "",
      "fix": "KB5127689",
      "url": "https://patchblox.com/security/fix/microsoft/kb5127689",
      "released": "2026-10-13T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 23H2",
      "fixedVersion": "",
      "fix": "KB5127692",
      "url": "https://patchblox.com/security/fix/microsoft/kb5127692",
      "released": "2026-10-13T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 24H2",
      "fixedVersion": "",
      "fix": "KB5127690",
      "url": "https://patchblox.com/security/fix/microsoft/kb5127690",
      "released": "2026-10-13T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 25H2",
      "fixedVersion": "",
      "fix": "KB5127690",
      "url": "https://patchblox.com/security/fix/microsoft/kb5127690",
      "released": "2026-10-13T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 26H2",
      "fixedVersion": "",
      "fix": "KB5127694",
      "url": "https://patchblox.com/security/fix/microsoft/kb5127694",
      "released": "2026-10-13T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2022",
      "fixedVersion": "",
      "fix": "KB5127693",
      "url": "https://patchblox.com/security/fix/microsoft/kb5127693",
      "released": "2026-10-13T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2025",
      "fixedVersion": "",
      "fix": "KB5127690",
      "url": "https://patchblox.com/security/fix/microsoft/kb5127690",
      "released": "2026-10-13T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012",
      "fixedVersion": "",
      "fix": "KB5127667",
      "url": "https://patchblox.com/security/fix/microsoft/kb5127667",
      "released": "2026-10-13T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2",
      "fixedVersion": "",
      "fix": "KB5127668",
      "url": "https://patchblox.com/security/fix/microsoft/kb5127668",
      "released": "2026-10-13T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft .NET Framework 4.8 on Windows 10 version 1607",
      "fixedVersion": "",
      "fix": "KB5127684",
      "url": "https://patchblox.com/security/fix/microsoft/kb5127684",
      "released": "2026-10-13T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft .NET Framework 4.8 on Windows Server 2012",
      "fixedVersion": "",
      "fix": "KB5127686",
      "url": "https://patchblox.com/security/fix/microsoft/kb5127686",
      "released": "2026-10-13T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft .NET Framework 4.8 on Windows Server 2012 R2",
      "fixedVersion": "",
      "fix": "KB5127688",
      "url": "https://patchblox.com/security/fix/microsoft/kb5127688",
      "released": "2026-10-13T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft .NET Framework 4.8 on Windows Server 2016",
      "fixedVersion": "",
      "fix": "KB5127684",
      "url": "https://patchblox.com/security/fix/microsoft/kb5127684",
      "released": "2026-10-13T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft .NET Framework 4.8.1 on Windows 11 version 26H1",
      "fixedVersion": "",
      "fix": "KB5127691",
      "url": "https://patchblox.com/security/fix/microsoft/kb5127691",
      "released": "2026-10-13T07:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-07T12:40:37Z"
}