{
  "document": {
    "acknowledgments": [
      {
        "names": [
          "<a href=\"https://www.aswsec.com\">Adam Willard</a>"
        ]
      }
    ],
    "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-2021-36940 Microsoft SharePoint Server Spoofing Vulnerability - HTML",
        "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36940"
      },
      {
        "category": "self",
        "summary": "CVE-2021-36940 Microsoft SharePoint Server Spoofing Vulnerability - CSAF",
        "url": "https://msrc.microsoft.com/csaf/advisories/2021/msrc_cve-2021-36940.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": "Microsoft SharePoint Server Spoofing Vulnerability",
    "tracking": {
      "current_release_date": "2021-08-10T07:00:00.000Z",
      "generator": {
        "date": "2026-08-10T15:09:50.411Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2021-36940",
      "initial_release_date": "2021-08-10T07:00:00.000Z",
      "revision_history": [
        {
          "date": "2021-08-10T07:00:00.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "<16.0.5200.1000",
            "product": {
              "name": "Microsoft SharePoint Enterprise Server 2016 <16.0.5200.1000",
              "product_id": "3"
            }
          },
          {
            "category": "product_version",
            "name": "16.0.5200.1000",
            "product": {
              "name": "Microsoft SharePoint Enterprise Server 2016 16.0.5200.1000",
              "product_id": "10950"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft SharePoint Enterprise Server 2016"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "<15.0.5371.1000",
            "product": {
              "name": "Microsoft SharePoint Enterprise Server 2013 Service Pack 1 <15.0.5371.1000",
              "product_id": "2"
            }
          },
          {
            "category": "product_version",
            "name": "15.0.5371.1000",
            "product": {
              "name": "Microsoft SharePoint Enterprise Server 2013 Service Pack 1 15.0.5371.1000",
              "product_id": "11099"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft SharePoint Enterprise Server 2013 Service Pack 1"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "<16.0.10377.20000",
            "product": {
              "name": "Microsoft SharePoint Server 2019 <16.0.10377.20000",
              "product_id": "1"
            }
          },
          {
            "category": "product_version",
            "name": "16.0.10377.20000",
            "product": {
              "name": "Microsoft SharePoint Server 2019 16.0.10377.20000",
              "product_id": "11585"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft SharePoint Server 2019"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-36940",
      "notes": [
        {
          "category": "general",
          "text": "Microsoft",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "fixed": [
          "10950",
          "11099",
          "11585"
        ],
        "known_affected": [
          "1",
          "2",
          "3"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2021-36940 Microsoft SharePoint Server Spoofing Vulnerability - HTML",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36940"
        },
        {
          "category": "self",
          "summary": "CVE-2021-36940 Microsoft SharePoint Server Spoofing Vulnerability - CSAF",
          "url": "https://msrc.microsoft.com/csaf/advisories/2021/msrc_cve-2021-36940.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2021-08-10T07:00:00.000Z",
          "details": "16.0.5200.1000:Security Update:https://support.microsoft.com/kb/5002002",
          "product_ids": [
            "3"
          ],
          "url": "https://support.microsoft.com/kb/5002002"
        },
        {
          "category": "vendor_fix",
          "date": "2021-08-10T07:00:00.000Z",
          "details": "15.0.5371.1000:Security Update:https://support.microsoft.com/kb/4011600",
          "product_ids": [
            "2"
          ],
          "url": "https://support.microsoft.com/kb/4011600"
        },
        {
          "category": "vendor_fix",
          "date": "2021-08-10T07:00:00.000Z",
          "details": "16.0.10377.20000:Security Update:https://support.microsoft.com/kb/5002000",
          "product_ids": [
            "1"
          ],
          "url": "https://support.microsoft.com/kb/5002000"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.6,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "environmentalScore": 0.0,
            "exploitCodeMaturity": "UNPROVEN",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "remediationLevel": "OFFICIAL_FIX",
            "reportConfidence": "CONFIRMED",
            "scope": "CHANGED",
            "temporalScore": 6.6,
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "1",
            "2",
            "3"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Spoofing"
        },
        {
          "category": "exploit_status",
          "details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely;Older Software Release:Exploitation Less Likely"
        }
      ],
      "title": "Microsoft SharePoint Server Spoofing Vulnerability"
    }
  ]
}