{
  "document": {
    "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-2026-70125 Microsoft Office Outlook Remote Code Execution Vulnerability - HTML",
        "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70125"
      },
      {
        "category": "self",
        "summary": "CVE-2026-70125 Microsoft Office Outlook Remote Code Execution Vulnerability - CSAF",
        "url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-70125.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 Office Outlook Remote Code Execution Vulnerability",
    "tracking": {
      "current_release_date": "2026-09-30T07:00:00.000Z",
      "generator": {
        "date": "2026-10-10T07:02:52.112Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2026-70125",
      "initial_release_date": "2026-09-23T07:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-09-23T07:00:00.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        },
        {
          "date": "2026-09-23T07:00:00.000Z",
          "legacy_version": "1.1",
          "number": "2",
          "summary": "Information published. This CVE was addressed by updates that were released in September 2026, but the CVE was inadvertently omitted from the September 2026 Security Updates. This is an informational change only. Customers who have already installed the September 2026 updates do not need to take any further action."
        },
        {
          "date": "2026-09-30T07:00:00.000Z",
          "legacy_version": "1.2",
          "number": "3",
          "summary": "CWE added. Informational change only."
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "<https://aka.ms/OfficeSecurityReleases",
                "product": {
                  "name": "Microsoft 365 Apps for Enterprise for 32-bit Systems <https://aka.ms/OfficeSecurityReleases",
                  "product_id": "6"
                }
              },
              {
                "category": "product_version",
                "name": "https://aka.ms/OfficeSecurityReleases",
                "product": {
                  "name": "Microsoft 365 Apps for Enterprise for 32-bit Systems https://aka.ms/OfficeSecurityReleases",
                  "product_id": "11762"
                }
              }
            ],
            "category": "product_name",
            "name": "Microsoft 365 Apps for Enterprise for 32-bit Systems"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "<https://aka.ms/OfficeSecurityReleases",
                "product": {
                  "name": "Microsoft 365 Apps for Enterprise for 64-bit Systems <https://aka.ms/OfficeSecurityReleases",
                  "product_id": "5"
                }
              },
              {
                "category": "product_version",
                "name": "https://aka.ms/OfficeSecurityReleases",
                "product": {
                  "name": "Microsoft 365 Apps for Enterprise for 64-bit Systems https://aka.ms/OfficeSecurityReleases",
                  "product_id": "11763"
                }
              }
            ],
            "category": "product_name",
            "name": "Microsoft 365 Apps for Enterprise for 64-bit Systems"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "<https://aka.ms/OfficeSecurityReleases",
                "product": {
                  "name": "Microsoft Office LTSC 2021 for 32-bit editions <https://aka.ms/OfficeSecurityReleases",
                  "product_id": "3"
                }
              },
              {
                "category": "product_version",
                "name": "https://aka.ms/OfficeSecurityReleases",
                "product": {
                  "name": "Microsoft Office LTSC 2021 for 32-bit editions https://aka.ms/OfficeSecurityReleases",
                  "product_id": "11953"
                }
              }
            ],
            "category": "product_name",
            "name": "Microsoft Office LTSC 2021 for 32-bit editions"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "<https://aka.ms/OfficeSecurityReleases",
                "product": {
                  "name": "Microsoft Office LTSC 2021 for 64-bit editions <https://aka.ms/OfficeSecurityReleases",
                  "product_id": "4"
                }
              },
              {
                "category": "product_version",
                "name": "https://aka.ms/OfficeSecurityReleases",
                "product": {
                  "name": "Microsoft Office LTSC 2021 for 64-bit editions https://aka.ms/OfficeSecurityReleases",
                  "product_id": "11952"
                }
              }
            ],
            "category": "product_name",
            "name": "Microsoft Office LTSC 2021 for 64-bit editions"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "<https://aka.ms/OfficeSecurityReleases",
                "product": {
                  "name": "Microsoft Office LTSC 2024 for 32-bit editions <https://aka.ms/OfficeSecurityReleases",
                  "product_id": "2"
                }
              },
              {
                "category": "product_version",
                "name": "https://aka.ms/OfficeSecurityReleases",
                "product": {
                  "name": "Microsoft Office LTSC 2024 for 32-bit editions https://aka.ms/OfficeSecurityReleases",
                  "product_id": "12420"
                }
              }
            ],
            "category": "product_name",
            "name": "Microsoft Office LTSC 2024 for 32-bit editions"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "<https://aka.ms/OfficeSecurityReleases",
                "product": {
                  "name": "Microsoft Office LTSC 2024 for 64-bit editions <https://aka.ms/OfficeSecurityReleases",
                  "product_id": "1"
                }
              },
              {
                "category": "product_version",
                "name": "https://aka.ms/OfficeSecurityReleases",
                "product": {
                  "name": "Microsoft Office LTSC 2024 for 64-bit editions https://aka.ms/OfficeSecurityReleases",
                  "product_id": "12421"
                }
              }
            ],
            "category": "product_name",
            "name": "Microsoft Office LTSC 2024 for 64-bit editions"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-70125",
      "cwe": {
        "id": "CWE-122",
        "name": "Heap-based Buffer Overflow"
      },
      "notes": [
        {
          "category": "general",
          "text": "Microsoft",
          "title": "Assigning CNA"
        },
        {
          "category": "faq",
          "text": "An attacker must send a user a malicious Office file and convince them to open it.",
          "title": "According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?"
        }
      ],
      "product_status": {
        "fixed": [
          "11762",
          "11763",
          "11952",
          "11953",
          "12420",
          "12421"
        ],
        "known_affected": [
          "1",
          "2",
          "3",
          "4",
          "5",
          "6"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-70125 Microsoft Office Outlook Remote Code Execution Vulnerability - HTML",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70125"
        },
        {
          "category": "self",
          "summary": "CVE-2026-70125 Microsoft Office Outlook Remote Code Execution Vulnerability - CSAF",
          "url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-70125.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-09-23T07:00:00.000Z",
          "details": "https://aka.ms/OfficeSecurityReleases:Security Update:https://docs.microsoft.com/en-us/officeupdates/office365-proplus-security-updates",
          "product_ids": [
            "6",
            "5",
            "3",
            "4",
            "2",
            "1"
          ],
          "url": "https://docs.microsoft.com/en-us/officeupdates/office365-proplus-security-updates"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "exploitCodeMaturity": "UNPROVEN",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "remediationLevel": "OFFICIAL_FIX",
            "reportConfidence": "CONFIRMED",
            "scope": "UNCHANGED",
            "temporalScore": 7.7,
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "1",
            "2",
            "3",
            "4",
            "5",
            "6"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Remote Code Execution"
        },
        {
          "category": "exploit_status",
          "details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely"
        }
      ],
      "title": "Microsoft Office Outlook Remote Code Execution Vulnerability"
    }
  ]
}