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        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
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        "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.",
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            "name": "Windows Server 2012 R2"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c6.3.9600.23398",
                "product": {
                  "name": "Windows Server 2012 R2 (Server Core installation) \u003c6.3.9600.23398",
                  "product_id": "27"
                }
              },
              {
                "category": "product_version",
                "name": "6.3.9600.23398",
                "product": {
                  "name": "Windows Server 2012 R2 (Server Core installation) 6.3.9600.23398",
                  "product_id": "10543"
                }
              }
            ],
            "category": "product_name",
            "name": "Windows Server 2012 R2 (Server Core installation)"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-81355",
      "cwe": {
        "id": "CWE-122",
        "name": "Heap-based Buffer Overflow"
      },
      "notes": [
        {
          "category": "general",
          "text": "Microsoft",
          "title": "Assigning CNA"
        },
        {
          "category": "faq",
          "text": "Successful exploitation of this vulnerability requires an attacker to have a deep understanding of the system. Successful exploitation is not guaranteed and depends on a combination of factors that might include the environment, system configuration, and the presence of additional security measures.",
          "title": "According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?"
        }
      ],
      "product_status": {
        "fixed": [
          "10378",
          "10379",
          "10483",
          "10543",
          "10816",
          "10852",
          "10853",
          "10855",
          "11568",
          "11569",
          "11571",
          "11572",
          "11923",
          "11924",
          "11929",
          "11930",
          "11931",
          "12097",
          "12098",
          "12099",
          "12242",
          "12243",
          "12389",
          "12390",
          "12436",
          "12437",
          "20437",
          "20438",
          "20853",
          "20854"
        ],
        "known_affected": [
          "1",
          "2",
          "3",
          "4",
          "5",
          "6",
          "7",
          "8",
          "9",
          "10",
          "11",
          "12",
          "13",
          "14",
          "15",
          "16",
          "17",
          "18",
          "19",
          "20",
          "21",
          "22",
          "23",
          "24",
          "25",
          "26",
          "27",
          "28",
          "29",
          "30"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-81355 Virtual Hard Disk (VHD) Miniport Driver Remote Code Execution Vulnerability - HTML",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-81355"
        },
        {
          "category": "self",
          "summary": "CVE-2026-81355 Virtual Hard Disk (VHD) Miniport Driver Remote Code Execution Vulnerability - CSAF",
          "url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-81355.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-09-08T07:00:00.000Z",
          "details": "10.0.17763.9245:Security Update:https://support.microsoft.com/help/5122876",
          "product_ids": [
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            "21",
            "20",
            "19"
          ],
          "url": "https://support.microsoft.com/help/5122876"
        },
        {
          "category": "vendor_fix",
          "date": "2026-09-08T07:00:00.000Z",
          "details": "10.0.20348.5622:Security Update:https://support.microsoft.com/help/5122882",
          "product_ids": [
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            "17"
          ],
          "url": "https://support.microsoft.com/help/5122882"
        },
        {
          "category": "vendor_fix",
          "date": "2026-09-08T07:00:00.000Z",
          "details": "10.0.19044.7725:Security Update:https://support.microsoft.com/help/5122878",
          "product_ids": [
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            "15",
            "14"
          ],
          "url": "https://support.microsoft.com/help/5122878"
        },
        {
          "category": "vendor_fix",
          "date": "2026-09-08T07:00:00.000Z",
          "details": "10.0.19045.7725:Security Update:https://support.microsoft.com/help/5122878",
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          "url": "https://support.microsoft.com/help/5122878"
        },
        {
          "category": "vendor_fix",
          "date": "2026-09-08T07:00:00.000Z",
          "details": "10.0.26100.33438:Security Update:https://support.microsoft.com/help/5122871",
          "product_ids": [
            "5",
            "6"
          ],
          "url": "https://support.microsoft.com/help/5122871"
        },
        {
          "category": "vendor_fix",
          "date": "2026-09-08T07:00:00.000Z",
          "details": "10.0.26200.9445:Security Update:https://support.microsoft.com/help/5124008",
          "product_ids": [
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            "3"
          ],
          "url": "https://support.microsoft.com/help/5124008"
        },
        {
          "category": "vendor_fix",
          "date": "2026-09-08T07:00:00.000Z",
          "details": "10.0.22631.7582:Security Update:https://support.microsoft.com/help/5122880",
          "product_ids": [
            "10",
            "9"
          ],
          "url": "https://support.microsoft.com/help/5122880"
        },
        {
          "category": "vendor_fix",
          "date": "2026-09-08T07:00:00.000Z",
          "details": "10.0.26100.9445:Security Update:https://support.microsoft.com/help/5124008",
          "product_ids": [
            "8",
            "7"
          ],
          "url": "https://support.microsoft.com/help/5124008"
        },
        {
          "category": "vendor_fix",
          "date": "2026-09-08T07:00:00.000Z",
          "details": "10.0.28000.2954:Security Update:https://support.microsoft.com/help/5124012",
          "product_ids": [
            "2",
            "1"
          ],
          "url": "https://support.microsoft.com/help/5124012"
        },
        {
          "category": "vendor_fix",
          "date": "2026-09-08T07:00:00.000Z",
          "details": "10.0.14393.9512:Security Update:https://support.microsoft.com/help/5123099",
          "product_ids": [
            "25",
            "24",
            "26",
            "23"
          ],
          "url": "https://support.microsoft.com/help/5123099"
        },
        {
          "category": "vendor_fix",
          "date": "2026-09-08T07:00:00.000Z",
          "details": "6.2.9200.26349:Monthly Rollup:https://support.microsoft.com/help/5123065",
          "product_ids": [
            "30",
            "29"
          ],
          "url": "https://support.microsoft.com/help/5123065"
        },
        {
          "category": "vendor_fix",
          "date": "2026-09-08T07:00:00.000Z",
          "details": "6.3.9600.23398:Monthly Rollup:https://support.microsoft.com/help/5123066",
          "product_ids": [
            "28",
            "27"
          ],
          "url": "https://support.microsoft.com/help/5123066"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "exploitCodeMaturity": "UNPROVEN",
            "integrityImpact": "HIGH",
            "privilegesRequired": "HIGH",
            "remediationLevel": "OFFICIAL_FIX",
            "reportConfidence": "CONFIRMED",
            "scope": "CHANGED",
            "temporalScore": 6.5,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "1",
            "2",
            "3",
            "4",
            "5",
            "6",
            "7",
            "8",
            "9",
            "10",
            "11",
            "12",
            "13",
            "14",
            "15",
            "16",
            "17",
            "18",
            "19",
            "20",
            "21",
            "22",
            "23",
            "24",
            "25",
            "26",
            "27",
            "28",
            "29",
            "30"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Remote Code Execution"
        },
        {
          "category": "exploit_status",
          "details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely"
        }
      ],
      "title": "Virtual Hard Disk (VHD) Miniport Driver Remote Code Execution Vulnerability"
    }
  ]
}