WID-SEC-W-2026-1603

Vulnerability from csaf_certbund - Published: 2026-05-19 22:00 - Updated: 2026-05-20 22:00
Summary
Microsoft Defender und Malware Protection Engine: Mehrere Schwachstellen
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 Defender ist eine Software zur Erkennung von schädlicher Software (Malware). Die Malware Protection Engine ist Bestandteil verschiedener Sicherheitsprodukte von Microsoft und stellt selbigen das Scannen sowie Erkennen und Entfernen von Schadprogrammen zur Verfügung.
Angriff: Ein Angreifer kann mehrere Schwachstellen in Microsoft Defender und Microsoft Malware Protection Engine ausnutzen, um seine Privilegien zu erhöhen, um beliebigen Code auszuführen und um einen Denial of Service Zustand herbeizuführen.
Betroffene Betriebssysteme: - Windows
CVE-2026-41091
Affected products
Product Identifier Version Remediation
Microsoft Malware Protection Engine <1.1.26040.8
Microsoft / Malware Protection Engine
 <1.1.26040.8
CVE-2026-45498
Affected products
Product Identifier Version Remediation
Microsoft Defender Antimalware Platform <4.18.26040.7
Microsoft / Defender
 Antimalware Platform <4.18.26040.7
CVE-2026-45584
Affected products
Product Identifier Version Remediation
Microsoft Malware Protection Engine <1.1.26040.8
Microsoft / Malware Protection Engine
 <1.1.26040.8
Microsoft Defender Antimalware Platform <4.18.26040.7
Microsoft / Defender
 Antimalware Platform <4.18.26040.7
References
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 Defender ist eine Software zur Erkennung von sch\u00e4dlicher Software (Malware).\r\nDie Malware Protection Engine ist Bestandteil verschiedener Sicherheitsprodukte von Microsoft und stellt selbigen das Scannen sowie Erkennen und Entfernen von Schadprogrammen zur Verf\u00fcgung.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein Angreifer kann mehrere Schwachstellen in Microsoft Defender und Microsoft Malware Protection Engine ausnutzen, um seine Privilegien zu erh\u00f6hen, um beliebigen Code auszuf\u00fchren und um einen Denial of Service Zustand herbeizuf\u00fchren.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- 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-2026-1603 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1603.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-1603 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1603"
      },
      {
        "category": "external",
        "summary": "Microsoft Leitfaden f\u00fcr Sicherheitsupdates vom 2026-05-19",
        "url": "https://msrc.microsoft.com/update-guide/"
      },
      {
        "category": "external",
        "summary": "Microsoft CVE-2026-45498 vom 2026-05-19",
        "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45498"
      },
      {
        "category": "external",
        "summary": "Microsoft CVE-2026-41091 vom 2026-05-19",
        "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41091"
      },
      {
        "category": "external",
        "summary": "Microsoft CVE-2026-45584 vom 2026-05-19",
        "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45584"
      }
    ],
    "source_lang": "en-US",
    "title": "Microsoft Defender und Malware Protection Engine: Mehrere Schwachstellen",
    "tracking": {
      "current_release_date": "2026-05-20T22:00:00.000+00:00",
      "generator": {
        "date": "2026-05-21T07:35:37.903+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.6.0"
        }
      },
      "id": "WID-SEC-W-2026-1603",
      "initial_release_date": "2026-05-19T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-05-19T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2026-05-20T22:00:00.000+00:00",
          "number": "2",
          "summary": "Referenz(en) aufgenommen: EUVD-2026-31105, EUVD-2026-31101, EUVD-2026-31102"
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "Antimalware Platform \u003c4.18.26040.7",
                "product": {
                  "name": "Microsoft Defender Antimalware Platform \u003c4.18.26040.7",
                  "product_id": "T054345"
                }
              },
              {
                "category": "product_version",
                "name": "Antimalware Platform 4.18.26040.7",
                "product": {
                  "name": "Microsoft Defender Antimalware Platform 4.18.26040.7",
                  "product_id": "T054345-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:microsoft:defender:4.18.26040.7::antimalware_platform"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Defender"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c1.1.26040.8",
                "product": {
                  "name": "Microsoft Malware Protection Engine \u003c1.1.26040.8",
                  "product_id": "T054347"
                }
              },
              {
                "category": "product_version",
                "name": "1.1.26040.8",
                "product": {
                  "name": "Microsoft Malware Protection Engine 1.1.26040.8",
                  "product_id": "T054347-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:microsoft:malware_protection_engine:1.1.26040.8"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Malware Protection Engine"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-41091",
      "product_status": {
        "known_affected": [
          "T054347"
        ]
      },
      "release_date": "2026-05-19T22:00:00.000+00:00",
      "title": "CVE-2026-41091"
    },
    {
      "cve": "CVE-2026-45498",
      "product_status": {
        "known_affected": [
          "T054345"
        ]
      },
      "release_date": "2026-05-19T22:00:00.000+00:00",
      "title": "CVE-2026-45498"
    },
    {
      "cve": "CVE-2026-45584",
      "product_status": {
        "known_affected": [
          "T054347",
          "T054345"
        ]
      },
      "release_date": "2026-05-19T22:00:00.000+00:00",
      "title": "CVE-2026-45584"
    }
  ]
}


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