Vulnerability-Lookup

WID-SEC-W-2026-3542

Vulnerability from csaf_certbund - Published: 2026-09-23 22:00 - Updated: 2026-09-23 22:00

Summary

Microsoft Outlook: Schwachstelle ermöglicht Codeausführung

Severity

Hoch

Notes

Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.

Produktbeschreibung: Microsoft Office LTSC ist eine Office-Suite für Unternehmen, die als Volumenlizenz mit langfristigem Support angeboten wird. Microsoft 365 Apps ist eine Office Suite für zahlreiche Büroanwendungen.

Angriff: Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Microsoft Outlook ausnutzen, um beliebigen Programmcode auszuführen.

Betroffene Betriebssysteme: - MacOS X - Windows

CVE-2026-70125

Affected products

Known affected 3 products

Product	Identifier	Version
Microsoft Office LTSC 2024 Microsoft	`cpe:/a:microsoft:microsoft_office_ltsc_2024:-`	—
Microsoft Office LTSC 2021 Microsoft	`cpe:/a:microsoft:microsoft_office_ltsc_2021:-`	—
Microsoft 365 Apps Microsoft	`cpe:/a:microsoft:365_apps:-`	—

References

3 references

URL	Category
https://wid.cert-bund.de/.well-known/csaf/white/2…	self
https://wid.cert-bund.de/portal/wid/securityadvis…	self
https://msrc.microsoft.com/update-guide/vulnerabi…	external

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
      "text": "hoch"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "Microsoft Office LTSC ist eine Office-Suite f\u00fcr Unternehmen, die als Volumenlizenz mit langfristigem Support angeboten wird.\r\nMicrosoft 365 Apps ist eine Office Suite f\u00fcr zahlreiche B\u00fcroanwendungen.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Microsoft Outlook ausnutzen, um beliebigen Programmcode auszuf\u00fchren.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- MacOS X\n- Windows",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2026-3542 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3542.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-3542 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-3542"
      },
      {
        "category": "external",
        "summary": "Microsoft Security Update Guide vom 2026-09-23",
        "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70125"
      }
    ],
    "source_lang": "en-US",
    "title": "Microsoft Outlook: Schwachstelle erm\u00f6glicht Codeausf\u00fchrung",
    "tracking": {
      "current_release_date": "2026-09-23T22:00:00.000+00:00",
      "generator": {
        "date": "2026-09-24T10:59:29.676+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.6.0"
        }
      },
      "id": "WID-SEC-W-2026-3542",
      "initial_release_date": "2026-09-23T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-09-23T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Microsoft 365 Apps",
            "product": {
              "name": "Microsoft 365 Apps",
              "product_id": "T053910",
              "product_identification_helper": {
                "cpe": "cpe:/a:microsoft:365_apps:-"
              }
            }
          },
          {
            "category": "product_name",
            "name": "Microsoft Office LTSC 2021",
            "product": {
              "name": "Microsoft Office LTSC 2021",
              "product_id": "T050315",
              "product_identification_helper": {
                "cpe": "cpe:/a:microsoft:microsoft_office_ltsc_2021:-"
              }
            }
          },
          {
            "category": "product_name",
            "name": "Microsoft Office LTSC 2024",
            "product": {
              "name": "Microsoft Office LTSC 2024",
              "product_id": "T050316",
              "product_identification_helper": {
                "cpe": "cpe:/a:microsoft:microsoft_office_ltsc_2024:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-70125",
      "product_status": {
        "known_affected": [
          "T050316",
          "T050315",
          "T053910"
        ]
      },
      "release_date": "2026-09-23T22:00:00.000+00:00",
      "title": "CVE-2026-70125"
    }
  ]
}

CVE-2026-70125 (GCVE-0-2026-70125)

Vulnerability from cvelistv5 – Published: 2026-09-23 22:40 – Updated: 2026-10-01 22:56

Title

Microsoft Office Outlook Remote Code Execution Vulnerability

Summary

Microsoft Office Outlook Remote Code Execution Vulnerability

Severity

8.8 (High)


                        
                          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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-24 00:00 UTC

CWE

CWE-122 - Heap-based Buffer Overflow
CWE-noinfo Not enough information

Assigner

microsoft mitre root Scorecard

References

1 reference

URL	Tags
https://msrc.microsoft.com/update-guide/vulnerabi…	vendor-advisorypatch

Impacted products

3 products

Vendor	Product	Version
Microsoft	Microsoft 365 Apps for Enterprise	Affected: 16.0.1 , < https://aka.ms/OfficeSecurityReleases (custom)
Microsoft	Microsoft Office LTSC 2021	Affected: 16.0.1 , < https://aka.ms/OfficeSecurityReleases (custom)
Microsoft	Microsoft Office LTSC 2024	Affected: 16.0.0 , < https://aka.ms/OfficeSecurityReleases (custom)

Date Public

2026-09-23 14:00

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-70125",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-24T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "description": "CWE-noinfo Not enough information",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-25T03:55:19.099Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Microsoft 365 Apps for Enterprise",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "https://aka.ms/OfficeSecurityReleases",
              "status": "affected",
              "version": "16.0.1",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Microsoft Office LTSC 2021",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "https://aka.ms/OfficeSecurityReleases",
              "status": "affected",
              "version": "16.0.1",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Microsoft Office LTSC 2024",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "https://aka.ms/OfficeSecurityReleases",
              "status": "affected",
              "version": "16.0.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:microsoft:365_apps:*:*:*:*:enterprise:*:*:*",
                  "versionEndExcluding": "https://aka.ms/OfficeSecurityReleases",
                  "versionStartIncluding": "16.0.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:microsoft:office_2021:*:*:*:*:long_term_servicing_channel:*:*:*",
                  "versionEndExcluding": "https://aka.ms/OfficeSecurityReleases",
                  "versionStartIncluding": "16.0.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:microsoft:office_2024:*:*:*:*:long_term_servicing_channel:*:*:*",
                  "versionEndExcluding": "https://aka.ms/OfficeSecurityReleases",
                  "versionStartIncluding": "16.0.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-09-23T14:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Microsoft Office Outlook Remote Code Execution Vulnerability"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "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"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
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              "description": "CWE-122: Heap-based Buffer Overflow",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-01T22:56:21.122Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Microsoft Office Outlook Remote Code Execution Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70125"
        }
      ],
      "title": "Microsoft Office Outlook Remote Code Execution Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
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    "datePublished": "2026-09-23T22:40:40.537Z",
    "dateReserved": "2026-08-03T23:31:50.775Z",
    "dateUpdated": "2026-10-01T22:56:21.122Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
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Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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WID-SEC-W-2026-3542

CVE-2026-70125 (GCVE-0-2026-70125)

Tags

Sightings

Nomenclature

Related by attack behaviour