{
  "document": {
    "acknowledgments": [
      {
        "names": [
          "Steven Seeley (mr_me) of Source Incite working with Trend Micro Zero Day Initiative"
        ]
      }
    ],
    "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-2021-31206 Microsoft Exchange Server Remote Code Execution Vulnerability - HTML",
        "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-31206"
      },
      {
        "category": "self",
        "summary": "CVE-2021-31206 Microsoft Exchange Server Remote Code Execution Vulnerability - CSAF",
        "url": "https://msrc.microsoft.com/csaf/advisories/2021/msrc_cve-2021-31206.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 Exchange Server Remote Code Execution Vulnerability",
    "tracking": {
      "current_release_date": "2021-07-13T07:00:00.000Z",
      "generator": {
        "date": "2026-08-10T15:10:54.753Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2021-31206",
      "initial_release_date": "2021-07-13T07:00:00.000Z",
      "revision_history": [
        {
          "date": "2021-07-13T07:00:00.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "<15.02.0858.015",
            "product": {
              "name": "Microsoft Exchange Server 2019 Cumulative Update 9 <15.02.0858.015",
              "product_id": "4"
            }
          },
          {
            "category": "product_version",
            "name": "15.02.0858.015",
            "product": {
              "name": "Microsoft Exchange Server 2019 Cumulative Update 9 15.02.0858.015",
              "product_id": "11887"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft Exchange Server 2019 Cumulative Update 9"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "<15.01.2242.012",
            "product": {
              "name": "Microsoft Exchange Server 2016 Cumulative Update 20 <15.01.2242.012",
              "product_id": "3"
            }
          },
          {
            "category": "product_version",
            "name": "15.01.2242.012",
            "product": {
              "name": "Microsoft Exchange Server 2016 Cumulative Update 20 15.01.2242.012",
              "product_id": "11888"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft Exchange Server 2016 Cumulative Update 20"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "<15.00.1497.023",
            "product": {
              "name": "Microsoft Exchange Server 2013 Cumulative Update 23 <15.00.1497.023",
              "product_id": "5"
            }
          },
          {
            "category": "product_version",
            "name": "15.00.1497.023",
            "product": {
              "name": "Microsoft Exchange Server 2013 Cumulative Update 23 15.00.1497.023",
              "product_id": "11682"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft Exchange Server 2013 Cumulative Update 23"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "<15.01.2308.014",
            "product": {
              "name": "Microsoft Exchange Server 2016 Cumulative Update 21 <15.01.2308.014",
              "product_id": "2"
            }
          },
          {
            "category": "product_version",
            "name": "15.01.2308.014",
            "product": {
              "name": "Microsoft Exchange Server 2016 Cumulative Update 21 15.01.2308.014",
              "product_id": "11906"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft Exchange Server 2016 Cumulative Update 21"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "<15.02.0922.013",
            "product": {
              "name": "Microsoft Exchange Server 2019 Cumulative Update 10 <15.02.0922.013",
              "product_id": "1"
            }
          },
          {
            "category": "product_version",
            "name": "15.02.0922.013",
            "product": {
              "name": "Microsoft Exchange Server 2019 Cumulative Update 10 15.02.0922.013",
              "product_id": "11908"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft Exchange Server 2019 Cumulative Update 10"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-31206",
      "notes": [
        {
          "category": "general",
          "text": "Microsoft",
          "title": "Assigning CNA"
        },
        {
          "category": "faq",
          "text": "Yes, this was one of the Exchange Server vulnerabilities found in the 2021 Pwn2Own contest.",
          "title": "Was this vulnerability found in the 2021 Pwn2Own contest?"
        }
      ],
      "product_status": {
        "fixed": [
          "11682",
          "11887",
          "11888",
          "11906",
          "11908"
        ],
        "known_affected": [
          "1",
          "2",
          "3",
          "4",
          "5"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2021-31206 Microsoft Exchange Server Remote Code Execution Vulnerability - HTML",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-31206"
        },
        {
          "category": "self",
          "summary": "CVE-2021-31206 Microsoft Exchange Server Remote Code Execution Vulnerability - CSAF",
          "url": "https://msrc.microsoft.com/csaf/advisories/2021/msrc_cve-2021-31206.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2021-07-13T07:00:00.000Z",
          "details": "15.02.0858.015:Security Update:https://support.microsoft.com/help/5004780",
          "product_ids": [
            "4"
          ],
          "url": "https://support.microsoft.com/help/5004780"
        },
        {
          "category": "vendor_fix",
          "date": "2021-07-13T07:00:00.000Z",
          "details": "15.01.2242.012:Security Update:https://support.microsoft.com/help/5004779",
          "product_ids": [
            "3"
          ],
          "url": "https://support.microsoft.com/help/5004779"
        },
        {
          "category": "vendor_fix",
          "date": "2021-07-13T07:00:00.000Z",
          "details": "15.00.1497.023:Security Update:https://support.microsoft.com/help/5004778",
          "product_ids": [
            "5"
          ],
          "url": "https://support.microsoft.com/help/5004778"
        },
        {
          "category": "vendor_fix",
          "date": "2021-07-13T07:00:00.000Z",
          "details": "15.01.2308.014:Security Update:https://support.microsoft.com/help/5004779",
          "product_ids": [
            "2"
          ],
          "url": "https://support.microsoft.com/help/5004779"
        },
        {
          "category": "vendor_fix",
          "date": "2021-07-13T07:00:00.000Z",
          "details": "15.02.0922.013:Security Update:https://support.microsoft.com/help/5004780",
          "product_ids": [
            "1"
          ],
          "url": "https://support.microsoft.com/help/5004780"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 7.6,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "environmentalScore": 0.0,
            "exploitCodeMaturity": "FUNCTIONAL",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "remediationLevel": "OFFICIAL_FIX",
            "reportConfidence": "CONFIRMED",
            "scope": "UNCHANGED",
            "temporalScore": 7.1,
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L/E:F/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "1",
            "2",
            "3",
            "4",
            "5"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Remote Code Execution"
        },
        {
          "category": "exploit_status",
          "details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely;Older Software Release:Exploitation Less Likely"
        }
      ],
      "title": "Microsoft Exchange Server Remote Code Execution Vulnerability"
    }
  ]
}