{
  "document": {
    "acknowledgments": [
      {
        "names": [
          "Microsoft"
        ]
      },
      {
        "names": [
          "Microsoft"
        ]
      }
    ],
    "aggregate_severity": {
      "namespace": "https://www.microsoft.com/en-us/msrc/security-update-severity-rating-system",
      "text": "Important"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Public",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
      },
      {
        "category": "general",
        "text": "Required. The vulnerability documented by this CVE requires customer action to resolve.",
        "title": "Customer Action"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "secure@microsoft.com",
      "name": "Microsoft Security Response Center",
      "namespace": "https://msrc.microsoft.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "CVE-2026-44805 Windows Network Controller (NC) Host Agent Denial of Service Vulnerability - HTML",
        "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44805"
      },
      {
        "category": "self",
        "summary": "CVE-2026-44805 Windows Network Controller (NC) Host Agent Denial of Service Vulnerability - CSAF",
        "url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-44805.json"
      },
      {
        "category": "external",
        "summary": "Microsoft Exploitability Index",
        "url": "https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1"
      },
      {
        "category": "external",
        "summary": "Microsoft Support Lifecycle",
        "url": "https://support.microsoft.com/lifecycle"
      },
      {
        "category": "external",
        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "Windows Network Controller (NC) Host Agent Denial of Service Vulnerability",
    "tracking": {
      "current_release_date": "2026-06-09T07:00:00.000Z",
      "generator": {
        "date": "2026-06-10T17:53:12.089Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2026-44805",
      "initial_release_date": "2026-06-09T07:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-06-09T07:00:00.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "<10.0.17763.8880",
            "product": {
              "name": "Windows Server 2019 <10.0.17763.8880",
              "product_id": "6"
            }
          },
          {
            "category": "product_version",
            "name": "10.0.17763.8880",
            "product": {
              "name": "Windows Server 2019 10.0.17763.8880",
              "product_id": "11571"
            }
          }
        ],
        "category": "product_name",
        "name": "Windows Server 2019"
      },
      {
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          {
            "category": "product_version_range",
            "name": "<10.0.17763.8880",
            "product": {
              "name": "Windows Server 2019 (Server Core installation) <10.0.17763.8880",
              "product_id": "5"
            }
          },
          {
            "category": "product_version",
            "name": "10.0.17763.8880",
            "product": {
              "name": "Windows Server 2019 (Server Core installation) 10.0.17763.8880",
              "product_id": "11572"
            }
          }
        ],
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        "name": "Windows Server 2019 (Server Core installation)"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "<10.0.20348.5256",
            "product": {
              "name": "Windows Server 2022 <10.0.20348.5256",
              "product_id": "4"
            }
          },
          {
            "category": "product_version",
            "name": "10.0.20348.5256",
            "product": {
              "name": "Windows Server 2022 10.0.20348.5256",
              "product_id": "11923"
            }
          }
        ],
        "category": "product_name",
        "name": "Windows Server 2022"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "<10.0.20348.5256",
            "product": {
              "name": "Windows Server 2022 (Server Core installation) <10.0.20348.5256",
              "product_id": "3"
            }
          },
          {
            "category": "product_version",
            "name": "10.0.20348.5256",
            "product": {
              "name": "Windows Server 2022 (Server Core installation) 10.0.20348.5256",
              "product_id": "11924"
            }
          }
        ],
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        "name": "Windows Server 2022 (Server Core installation)"
      },
      {
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          {
            "category": "product_version_range",
            "name": "<10.0.26100.32995",
            "product": {
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              "product_id": "1"
            }
          },
          {
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            "name": "10.0.26100.32995",
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              "product_id": "12437"
            }
          }
        ],
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        "name": "Windows Server 2025 (Server Core installation)"
      },
      {
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          {
            "category": "product_version_range",
            "name": "<10.0.26100.32995",
            "product": {
              "name": "Windows Server 2025 <10.0.26100.32995",
              "product_id": "2"
            }
          },
          {
            "category": "product_version",
            "name": "10.0.26100.32995",
            "product": {
              "name": "Windows Server 2025 10.0.26100.32995",
              "product_id": "12436"
            }
          }
        ],
        "category": "product_name",
        "name": "Windows Server 2025"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-44805",
      "cwe": {
        "id": "CWE-416",
        "name": "Use After Free"
      },
      "notes": [
        {
          "category": "general",
          "text": "Microsoft",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "fixed": [
          "11571",
          "11572",
          "11923",
          "11924",
          "12436",
          "12437"
        ],
        "known_affected": [
          "1",
          "2",
          "3",
          "4",
          "5",
          "6"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-44805 Windows Network Controller (NC) Host Agent Denial of Service Vulnerability - HTML",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44805"
        },
        {
          "category": "self",
          "summary": "CVE-2026-44805 Windows Network Controller (NC) Host Agent Denial of Service Vulnerability - CSAF",
          "url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-44805.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-06-09T07:00:00.000Z",
          "details": "10.0.17763.8880:Security Update:https://support.microsoft.com/help/5094123",
          "product_ids": [
            "6",
            "5"
          ],
          "url": "https://support.microsoft.com/help/5094123"
        },
        {
          "category": "vendor_fix",
          "date": "2026-06-09T07:00:00.000Z",
          "details": "10.0.20348.5256:Security Update:https://support.microsoft.com/help/5094128",
          "product_ids": [
            "4",
            "3"
          ],
          "url": "https://support.microsoft.com/help/5094128"
        },
        {
          "category": "vendor_fix",
          "date": "2026-06-09T07:00:00.000Z",
          "details": "10.0.26100.32995:Security Update:https://support.microsoft.com/help/5094125",
          "product_ids": [
            "1",
            "2"
          ],
          "url": "https://support.microsoft.com/help/5094125"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "environmentalsScore": 0.0,
            "exploitCodeMaturity": "UNPROVEN",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "remediationLevel": "OFFICIAL_FIX",
            "reportConfidence": "CONFIRMED",
            "scope": "UNCHANGED",
            "temporalScore": 4.8,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "1",
            "2",
            "3",
            "4",
            "5",
            "6"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Denial of Service"
        },
        {
          "category": "exploit_status",
          "details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Unlikely"
        }
      ],
      "title": "Windows Network Controller (NC) Host Agent Denial of Service Vulnerability"
    }
  ]
}