{
  "document": {
    "acknowledgments": [
      {
        "names": [
          "Microsoft"
        ]
      }
    ],
    "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-2026-42906 Windows Shell Information Disclosure Vulnerability - HTML",
        "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42906"
      },
      {
        "category": "self",
        "summary": "CVE-2026-42906 Windows Shell Information Disclosure Vulnerability - CSAF",
        "url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-42906.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": "Windows Shell Information Disclosure Vulnerability",
    "tracking": {
      "current_release_date": "2026-06-09T07:00:00.000Z",
      "generator": {
        "date": "2026-06-10T17:53:11.976Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2026-42906",
      "initial_release_date": "2026-06-09T07:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-06-09T07:00:00.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "<10.0.20348.5256",
            "product": {
              "name": "Windows Server 2022 <10.0.20348.5256",
              "product_id": "18"
            }
          },
          {
            "category": "product_version",
            "name": "10.0.20348.5256",
            "product": {
              "name": "Windows Server 2022 10.0.20348.5256",
              "product_id": "11923"
            }
          }
        ],
        "category": "product_name",
        "name": "Windows Server 2022"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "<10.0.20348.5256",
            "product": {
              "name": "Windows Server 2022 (Server Core installation) <10.0.20348.5256",
              "product_id": "17"
            }
          },
          {
            "category": "product_version",
            "name": "10.0.20348.5256",
            "product": {
              "name": "Windows Server 2022 (Server Core installation) 10.0.20348.5256",
              "product_id": "11924"
            }
          }
        ],
        "category": "product_name",
        "name": "Windows Server 2022 (Server Core installation)"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "<10.0.19044.7417",
            "product": {
              "name": "Windows 10 Version 21H2 for 32-bit Systems <10.0.19044.7417",
              "product_id": "16"
            }
          },
          {
            "category": "product_version",
            "name": "10.0.19044.7417",
            "product": {
              "name": "Windows 10 Version 21H2 for 32-bit Systems 10.0.19044.7417",
              "product_id": "11929"
            }
          }
        ],
        "category": "product_name",
        "name": "Windows 10 Version 21H2 for 32-bit Systems"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "<10.0.19044.7417",
            "product": {
              "name": "Windows 10 Version 21H2 for ARM64-based Systems <10.0.19044.7417",
              "product_id": "15"
            }
          },
          {
            "category": "product_version",
            "name": "10.0.19044.7417",
            "product": {
              "name": "Windows 10 Version 21H2 for ARM64-based Systems 10.0.19044.7417",
              "product_id": "11930"
            }
          }
        ],
        "category": "product_name",
        "name": "Windows 10 Version 21H2 for ARM64-based Systems"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "<10.0.19044.7417",
            "product": {
              "name": "Windows 10 Version 21H2 for x64-based Systems <10.0.19044.7417",
              "product_id": "14"
            }
          },
          {
            "category": "product_version",
            "name": "10.0.19044.7417",
            "product": {
              "name": "Windows 10 Version 21H2 for x64-based Systems 10.0.19044.7417",
              "product_id": "11931"
            }
          }
        ],
        "category": "product_name",
        "name": "Windows 10 Version 21H2 for x64-based Systems"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "<10.0.19045.7417",
            "product": {
              "name": "Windows 10 Version 22H2 for x64-based Systems <10.0.19045.7417",
              "product_id": "13"
            }
          },
          {
            "category": "product_version",
            "name": "10.0.19045.7417",
            "product": {
              "name": "Windows 10 Version 22H2 for x64-based Systems 10.0.19045.7417",
              "product_id": "12097"
            }
          }
        ],
        "category": "product_name",
        "name": "Windows 10 Version 22H2 for x64-based Systems"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "<10.0.19045.7417",
            "product": {
              "name": "Windows 10 Version 22H2 for ARM64-based Systems <10.0.19045.7417",
              "product_id": "12"
            }
          },
          {
            "category": "product_version",
            "name": "10.0.19045.7417",
            "product": {
              "name": "Windows 10 Version 22H2 for ARM64-based Systems 10.0.19045.7417",
              "product_id": "12098"
            }
          }
        ],
        "category": "product_name",
        "name": "Windows 10 Version 22H2 for ARM64-based Systems"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "<10.0.19045.7417",
            "product": {
              "name": "Windows 10 Version 22H2 for 32-bit Systems <10.0.19045.7417",
              "product_id": "11"
            }
          },
          {
            "category": "product_version",
            "name": "10.0.19045.7417",
            "product": {
              "name": "Windows 10 Version 22H2 for 32-bit Systems 10.0.19045.7417",
              "product_id": "12099"
            }
          }
        ],
        "category": "product_name",
        "name": "Windows 10 Version 22H2 for 32-bit Systems"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "<10.0.26100.32995",
            "product": {
              "name": "Windows Server 2025 (Server Core installation) <10.0.26100.32995",
              "product_id": "5"
            }
          },
          {
            "category": "product_version",
            "name": "10.0.26100.32995",
            "product": {
              "name": "Windows Server 2025 (Server Core installation) 10.0.26100.32995",
              "product_id": "12437"
            }
          }
        ],
        "category": "product_name",
        "name": "Windows Server 2025 (Server Core installation)"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "<10.0.26200.8655",
            "product": {
              "name": "Windows 11 Version 25H2 for ARM64-based Systems <10.0.26200.8655",
              "product_id": "4"
            }
          },
          {
            "category": "product_version",
            "name": "10.0.26200.8655",
            "product": {
              "name": "Windows 11 Version 25H2 for ARM64-based Systems 10.0.26200.8655",
              "product_id": "20437"
            }
          }
        ],
        "category": "product_name",
        "name": "Windows 11 Version 25H2 for ARM64-based Systems"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "<10.0.26200.8655",
            "product": {
              "name": "Windows 11 Version 25H2 for x64-based Systems <10.0.26200.8655",
              "product_id": "3"
            }
          },
          {
            "category": "product_version",
            "name": "10.0.26200.8655",
            "product": {
              "name": "Windows 11 Version 25H2 for x64-based Systems 10.0.26200.8655",
              "product_id": "20438"
            }
          }
        ],
        "category": "product_name",
        "name": "Windows 11 Version 25H2 for x64-based Systems"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "<10.0.22631.7219",
            "product": {
              "name": "Windows 11 Version 23H2 for ARM64-based Systems <10.0.22631.7219",
              "product_id": "10"
            }
          },
          {
            "category": "product_version",
            "name": "10.0.22631.7219",
            "product": {
              "name": "Windows 11 Version 23H2 for ARM64-based Systems 10.0.22631.7219",
              "product_id": "12242"
            }
          }
        ],
        "category": "product_name",
        "name": "Windows 11 Version 23H2 for ARM64-based Systems"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "<10.0.22631.7219",
            "product": {
              "name": "Windows 11 Version 23H2 for x64-based Systems <10.0.22631.7219",
              "product_id": "9"
            }
          },
          {
            "category": "product_version",
            "name": "10.0.22631.7219",
            "product": {
              "name": "Windows 11 Version 23H2 for x64-based Systems 10.0.22631.7219",
              "product_id": "12243"
            }
          }
        ],
        "category": "product_name",
        "name": "Windows 11 Version 23H2 for x64-based Systems"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "<10.0.26100.8655",
            "product": {
              "name": "Windows 11 Version 24H2 for ARM64-based Systems <10.0.26100.8655",
              "product_id": "8"
            }
          },
          {
            "category": "product_version",
            "name": "10.0.26100.8655",
            "product": {
              "name": "Windows 11 Version 24H2 for ARM64-based Systems 10.0.26100.8655",
              "product_id": "12389"
            }
          }
        ],
        "category": "product_name",
        "name": "Windows 11 Version 24H2 for ARM64-based Systems"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "<10.0.26100.8655",
            "product": {
              "name": "Windows 11 Version 24H2 for x64-based Systems <10.0.26100.8655",
              "product_id": "7"
            }
          },
          {
            "category": "product_version",
            "name": "10.0.26100.8655",
            "product": {
              "name": "Windows 11 Version 24H2 for x64-based Systems 10.0.26100.8655",
              "product_id": "12390"
            }
          }
        ],
        "category": "product_name",
        "name": "Windows 11 Version 24H2 for x64-based Systems"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "<10.0.26100.32995",
            "product": {
              "name": "Windows Server 2025 <10.0.26100.32995",
              "product_id": "6"
            }
          },
          {
            "category": "product_version",
            "name": "10.0.26100.32995",
            "product": {
              "name": "Windows Server 2025 10.0.26100.32995",
              "product_id": "12436"
            }
          }
        ],
        "category": "product_name",
        "name": "Windows Server 2025"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "<10.0.28000.2269",
            "product": {
              "name": "Windows 11 version 26H1 for x64-based Systems <10.0.28000.2269",
              "product_id": "2"
            }
          },
          {
            "category": "product_version",
            "name": "10.0.28000.2269",
            "product": {
              "name": "Windows 11 version 26H1 for x64-based Systems 10.0.28000.2269",
              "product_id": "20853"
            }
          }
        ],
        "category": "product_name",
        "name": "Windows 11 version 26H1 for x64-based Systems"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "<10.0.28000.2269",
            "product": {
              "name": "Windows 11 Version 26H1 for ARM64-based Systems <10.0.28000.2269",
              "product_id": "1"
            }
          },
          {
            "category": "product_version",
            "name": "10.0.28000.2269",
            "product": {
              "name": "Windows 11 Version 26H1 for ARM64-based Systems 10.0.28000.2269",
              "product_id": "20854"
            }
          }
        ],
        "category": "product_name",
        "name": "Windows 11 Version 26H1 for ARM64-based Systems"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-42906",
      "cwe": {
        "id": "CWE-200",
        "name": "Exposure of Sensitive Information to an Unauthorized Actor"
      },
      "notes": [
        {
          "category": "general",
          "text": "Microsoft",
          "title": "Assigning CNA"
        },
        {
          "category": "faq",
          "text": "The type of information that could be disclosed if an attacker successfully exploited this vulnerability is the local memory address.",
          "title": "What type of information could be disclosed by this vulnerability?"
        }
      ],
      "product_status": {
        "fixed": [
          "11923",
          "11924",
          "11929",
          "11930",
          "11931",
          "12097",
          "12098",
          "12099",
          "12242",
          "12243",
          "12389",
          "12390",
          "12436",
          "12437",
          "20437",
          "20438",
          "20853",
          "20854"
        ],
        "known_affected": [
          "1",
          "2",
          "3",
          "4",
          "5",
          "6",
          "7",
          "8",
          "9",
          "10",
          "11",
          "12",
          "13",
          "14",
          "15",
          "16",
          "17",
          "18"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-42906 Windows Shell Information Disclosure Vulnerability - HTML",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42906"
        },
        {
          "category": "self",
          "summary": "CVE-2026-42906 Windows Shell Information Disclosure Vulnerability - CSAF",
          "url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-42906.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-06-09T07:00:00.000Z",
          "details": "10.0.20348.5256:Security Update:https://support.microsoft.com/help/5094128",
          "product_ids": [
            "18",
            "17"
          ],
          "url": "https://support.microsoft.com/help/5094128"
        },
        {
          "category": "vendor_fix",
          "date": "2026-06-09T07:00:00.000Z",
          "details": "10.0.19044.7417:Security Update:https://support.microsoft.com/help/5094127",
          "product_ids": [
            "16",
            "15",
            "14"
          ],
          "url": "https://support.microsoft.com/help/5094127"
        },
        {
          "category": "vendor_fix",
          "date": "2026-06-09T07:00:00.000Z",
          "details": "10.0.19045.7417:Security Update:https://support.microsoft.com/help/5094127",
          "product_ids": [
            "13",
            "12",
            "11"
          ],
          "url": "https://support.microsoft.com/help/5094127"
        },
        {
          "category": "vendor_fix",
          "date": "2026-06-09T07:00:00.000Z",
          "details": "10.0.26100.32995:Security Update:https://support.microsoft.com/help/5094125",
          "product_ids": [
            "5",
            "6"
          ],
          "url": "https://support.microsoft.com/help/5094125"
        },
        {
          "category": "vendor_fix",
          "date": "2026-06-09T07:00:00.000Z",
          "details": "10.0.26200.8655:Security Update:https://support.microsoft.com/help/5094126",
          "product_ids": [
            "4",
            "3"
          ],
          "url": "https://support.microsoft.com/help/5094126"
        },
        {
          "category": "vendor_fix",
          "date": "2026-06-09T07:00:00.000Z",
          "details": "10.0.22631.7219:Security Update:https://support.microsoft.com/help/5093998",
          "product_ids": [
            "10",
            "9"
          ],
          "url": "https://support.microsoft.com/help/5093998"
        },
        {
          "category": "vendor_fix",
          "date": "2026-06-09T07:00:00.000Z",
          "details": "10.0.26100.8655:Security Update:https://support.microsoft.com/help/5094126",
          "product_ids": [
            "8",
            "7"
          ],
          "url": "https://support.microsoft.com/help/5094126"
        },
        {
          "category": "vendor_fix",
          "date": "2026-06-09T07:00:00.000Z",
          "details": "10.0.28000.2269:Security Update:https://support.microsoft.com/help/5095051",
          "product_ids": [
            "2",
            "1"
          ],
          "url": "https://support.microsoft.com/help/5095051"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "environmentalsScore": 0.0,
            "exploitCodeMaturity": "UNPROVEN",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "remediationLevel": "OFFICIAL_FIX",
            "reportConfidence": "CONFIRMED",
            "scope": "UNCHANGED",
            "temporalScore": 4.8,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "1",
            "2",
            "3",
            "4",
            "5",
            "6",
            "7",
            "8",
            "9",
            "10",
            "11",
            "12",
            "13",
            "14",
            "15",
            "16",
            "17",
            "18"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Information Disclosure"
        },
        {
          "category": "exploit_status",
          "details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely"
        }
      ],
      "title": "Windows Shell Information Disclosure Vulnerability"
    }
  ]
}