{
  "cveId": "CVE-2026-56155",
  "url": "https://patchblox.com/security/cve/CVE-2026-56155",
  "summary": "CVE-2026-56155 is fixed in 15 products on 1 platform, first by KB5099535, released July 14, 2026. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on July 14, 2026. Patch Radar priority: Patch now.",
  "title": "Active Directory Federation Services Elevation of Privilege Vulnerability",
  "description": "\u003Cp\u003EInsufficient granularity of access control in Active Directory Federation Services (AD FS) allows an authorized attacker to elevate privileges locally.\u003C/p\u003E",
  "published": "2026-07-14T07:00:00Z",
  "severity": "Important",
  "cvss": 7.8,
  "cwe": "Insufficient Granularity of Access Control",
  "epss": 0.00346,
  "epssPercentile": 0.28372,
  "priority": "Patch now",
  "priorityTier": 1,
  "exploited": true,
  "vendorExploited": true,
  "disclosed": false,
  "exploitabilityAssessment": "Exploitation Detected",
  "kev": {
    "added": "2026-07-14T00:00:00Z",
    "due": "2026-07-28T00:00:00Z",
    "ransomware": false,
    "requiredAction": "Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA\u2019s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA\u2019s \u201CForensics Triage Requirements\u201D (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset\u0027s internet exposure and ensuring adherence to BOD 26-04 patching guidelines."
  },
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56155",
  "fixes": [
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1607 for 32-bit Systems",
      "fixedVersion": "14393.9339",
      "fix": "KB5099535",
      "url": "https://patchblox.com/security/fix/microsoft/kb5099535",
      "released": "2026-07-14T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1607 for x64-based Systems",
      "fixedVersion": "14393.9339",
      "fix": "KB5099535",
      "url": "https://patchblox.com/security/fix/microsoft/kb5099535",
      "released": "2026-07-14T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1809 for 32-bit Systems",
      "fixedVersion": "17763.9020",
      "fix": "KB5099538",
      "url": "https://patchblox.com/security/fix/microsoft/kb5099538",
      "released": "2026-07-14T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1809 for x64-based Systems",
      "fixedVersion": "17763.9020",
      "fix": "KB5099538",
      "url": "https://patchblox.com/security/fix/microsoft/kb5099538",
      "released": "2026-07-14T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012",
      "fixedVersion": "",
      "fix": "KB5099445",
      "url": "https://patchblox.com/security/fix/microsoft/kb5099445",
      "released": "2026-07-14T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB5099445",
      "url": "https://patchblox.com/security/fix/microsoft/kb5099445",
      "released": "2026-07-14T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012 R2",
      "fixedVersion": "",
      "fix": "KB5099444",
      "url": "https://patchblox.com/security/fix/microsoft/kb5099444",
      "released": "2026-07-14T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012 R2 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB5099444",
      "url": "https://patchblox.com/security/fix/microsoft/kb5099444",
      "released": "2026-07-14T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2016",
      "fixedVersion": "14393.9339",
      "fix": "KB5099535",
      "url": "https://patchblox.com/security/fix/microsoft/kb5099535",
      "released": "2026-07-14T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2016 (Server Core installation)",
      "fixedVersion": "14393.9339",
      "fix": "KB5099535",
      "url": "https://patchblox.com/security/fix/microsoft/kb5099535",
      "released": "2026-07-14T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2019",
      "fixedVersion": "17763.9020",
      "fix": "KB5099538",
      "url": "https://patchblox.com/security/fix/microsoft/kb5099538",
      "released": "2026-07-14T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2019 (Server Core installation)",
      "fixedVersion": "17763.9020",
      "fix": "KB5099538",
      "url": "https://patchblox.com/security/fix/microsoft/kb5099538",
      "released": "2026-07-14T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2022",
      "fixedVersion": "20348.5386",
      "fix": "KB5099540",
      "url": "https://patchblox.com/security/fix/microsoft/kb5099540",
      "released": "2026-07-14T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2025",
      "fixedVersion": "26100.33158",
      "fix": "KB5099536",
      "url": "https://patchblox.com/security/fix/microsoft/kb5099536",
      "released": "2026-07-14T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2025 (Server Core installation)",
      "fixedVersion": "26100.33158",
      "fix": "KB5099536",
      "url": "https://patchblox.com/security/fix/microsoft/kb5099536",
      "released": "2026-07-14T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}