{
    "document": {
        "category": "csaf_base",
        "csaf_version": "2.0",
        "distribution": {
            "tlp": {
                "label": "WHITE"
            }
        },
        "lang": "en",
        "notes": [
            {
                "category": "legal_disclaimer",
                "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this portal to enhance access to its information and vulnerabilities. The use of this information is subject to the following terms and conditions:\n\nThe vulnerabilities disclosed in this portal are gathered by NCSC-NL from a variety of open sources, which the user can retrieve from other platforms. NCSC-NL makes every reasonable effort to ensure that the content of this portal is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or real-time keeping up-to-date. NCSC-NL does not control nor guarantee the accuracy, relevance, timeliness or completeness of information obtained from these external sources. The vulnerabilities disclosed in this portal are intended solely for the convenience of professional parties to take appropriate measures to manage the risks posed to the cybersecurity. No rights can be derived from the information provided therein.\n\nNCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of the vulnerabilities disclosed in this portal. This includes damage resulting from the inaccuracy of incompleteness of the information contained in it.\nThe information on this page is subject to Dutch law. All disputes related to or arising from the use of this portal regarding the disclosure of vulnerabilities will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings."
            }
        ],
        "publisher": {
            "category": "coordinator",
            "contact_details": "cert@ncsc.nl",
            "name": "National Cyber Security Centre",
            "namespace": "https://www.ncsc.nl/"
        },
        "title": "CVE-2026-66806",
        "tracking": {
            "current_release_date": "2026-08-11T21:39:58.134060Z",
            "generator": {
                "date": "2026-02-17T15:00:00Z",
                "engine": {
                    "name": "V.E.L.M.A",
                    "version": "1.7"
                }
            },
            "id": "CVE-2026-66806",
            "initial_release_date": "2026-08-11T00:28:21.979852Z",
            "revision_history": [
                {
                    "date": "2026-08-11T00:28:21.979852Z",
                    "number": "1",
                    "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (4).| Product Identifiers created (2).| Product Remediations created (4).| References created (3).| CWES updated (1).| Vendor_assessment created."
                },
                {
                    "date": "2026-08-11T00:28:23.405445Z",
                    "number": "2",
                    "summary": "NCSC Score created."
                },
                {
                    "date": "2026-08-11T06:14:36.300327Z",
                    "number": "3",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-08-11T17:42:22.965395Z",
                    "number": "4",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (5).| References created (1).| CWES updated (1)."
                },
                {
                    "date": "2026-08-11T17:42:24.559443Z",
                    "number": "5",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-08-11T17:44:56.167113Z",
                    "number": "6",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (1).| CWES updated (1)."
                },
                {
                    "date": "2026-08-11T17:45:07.178180Z",
                    "number": "7",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-08-11T18:28:42.929943Z",
                    "number": "8",
                    "summary": "Source connected.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (10).| Product Threats created (20).| Product Remediations created (10).| CWES updated (1).| Exploitable created."
                },
                {
                    "date": "2026-08-11T18:28:51.501785Z",
                    "number": "9",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-08-11T19:05:26.569604Z",
                    "number": "10",
                    "summary": "Source connected.| CVE status created. (valid)| News created (1)."
                },
                {
                    "date": "2026-08-11T19:05:28.386993Z",
                    "number": "11",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-08-11T20:11:57.968246Z",
                    "number": "12",
                    "summary": "Source connected.| CVE status created. (valid)"
                },
                {
                    "date": "2026-08-11T21:39:44.178573Z",
                    "number": "13",
                    "summary": "Unknown change."
                }
            ],
            "status": "interim",
            "version": "13"
        }
    },
    "product_tree": {
        "branches": [
            {
                "branches": [
                    {
                        "branches": [
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/16.0.1|<https://aka.ms/officesecurityreleases",
                                "product": {
                                    "name": "vers:unknown/16.0.1|<https://aka.ms/officesecurityreleases",
                                    "product_id": "CSAFPID-1288319"
                                }
                            }
                        ],
                        "category": "product_name",
                        "name": "Microsoft 365 Apps for Enterprise"
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                    {
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                                                "cpe": "cpe:2.3:a:microsoft:office_2024:*:*:*:*:long_term_servicing_channel:*:*:*"
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                                                "cpe": "cpe:2.3:a:microsoft:word_2016:*:*:*:*:*:*:*:*"
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                                "category": "product_name",
                                "name": "Microsoft Word 2016 (32-bit edition)"
                            },
                            {
                                "branches": [
                                    {
                                        "category": "product_version_range",
                                        "name": "vers:microsoft/*",
                                        "product": {
                                            "name": "vers:microsoft/*",
                                            "product_id": "CSAFPID-5137231",
                                            "product_identification_helper": {
                                                "cpe": "cpe:2.3:a:microsoft:word_2016:*:*:*:*:*:*:*:*"
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                                    }
                                ],
                                "category": "product_name",
                                "name": "Microsoft Word 2016 (64-bit edition)"
                            }
                        ],
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                            {
                                "category": "product_version_range",
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                            }
                        ],
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                        "name": "Microsoft Office 2019"
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                    {
                        "branches": [
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                                "category": "product_version_range",
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                        "name": "Microsoft Office LTSC 2021"
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                    {
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                                "category": "product_name",
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                    {
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                            {
                                "branches": [
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                                "category": "product_name",
                                "name": "console-rhel9"
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                        "name": "Red Hat Advanced Cluster Management for Kubernetes 2"
                    }
                ],
                "category": "vendor",
                "name": "Red Hat"
            }
        ]
    },
    "vulnerabilities": [
        {
            "cve": "CVE-2026-66806",
            "cwe": {
                "id": "CWE-295",
                "name": "Improper Certificate Validation"
            },
            "notes": [
                {
                    "category": "description",
                    "text": "A flaw was found in console. When the `HTTPS_PROXY` environment variable is not configured, the console component fails to verify Transport Layer Security (TLS) certificates for outbound connections. A network-positioned attacker (Man-in-the-Middle) can exploit this vulnerability to intercept the cluster pull-secret while it is being sent to console.redhat.com. This pull-secret is a critical credential that provides access to Red Hat container registries and cloud services, potentially leading to unauthorized access and sensitive information disclosure.\nImportant: The console component in Multicluster Engine for Kubernetes and Red Hat Advanced Cluster Management for Kubernetes disables TLS verification for outbound connections to console.redhat.com when the HTTPS_PROXY environment variable is not configured. This allows a network-positioned attacker to intercept the cluster pull-secret, a high-value credential, due to the lack of server certificate validation.",
                    "title": "redhat - https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-66806.json"
                },
                {
                    "category": "description",
                    "text": "Off-by-one error in Microsoft Office Word allows an unauthorized attacker to disclose information locally.",
                    "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/66xxx/CVE-2026-66806.json"
                },
                {
                    "category": "description",
                    "text": "Off-by-one error in Microsoft Office Word allows an unauthorized attacker to disclose information locally.",
                    "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-66806"
                },
                {
                    "category": "description",
                    "text": "<p>Off-by-one error in Microsoft Office Word allows an unauthorized attacker to disclose information locally.</p>\n",
                    "title": "microsoft - https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2026-Aug"
                },
                {
                    "category": "other",
                    "text": "4.9",
                    "title": "NCSC Score"
                },
                {
                    "category": "other",
                    "text": "There is news data available from source Bleepingcomputer, VENDOR FIX as product remediation category, IMPACT as product threat category",
                    "title": "NCSC Score top increasing factors"
                },
                {
                    "category": "other",
                    "text": "There is cwe data available from source Nvd, There is product_remediation data available from source Redhat",
                    "title": "NCSC Score top decreasing factors"
                },
                {
                    "category": "details",
                    "text": "Severity: 3\n",
                    "title": "Vendor assessment"
                }
            ],
            "product_status": {
                "known_affected": [
                    "CSAFPID-1441056",
                    "CSAFPID-1441080",
                    "CSAFPID-2109918",
                    "CSAFPID-2778177",
                    "CSAFPID-1288319",
                    "CSAFPID-1288368",
                    "CSAFPID-1288369",
                    "CSAFPID-3105172",
                    "CSAFPID-8962597",
                    "CSAFPID-5137204",
                    "CSAFPID-5137205",
                    "CSAFPID-5137206",
                    "CSAFPID-5137207",
                    "CSAFPID-5137209",
                    "CSAFPID-5137210",
                    "CSAFPID-5137211",
                    "CSAFPID-5137212",
                    "CSAFPID-5137230",
                    "CSAFPID-5137231"
                ]
            },
            "references": [
                {
                    "category": "external",
                    "summary": "Source - redhat",
                    "url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-66806.json"
                },
                {
                    "category": "external",
                    "summary": "Source - bleepingcomputer",
                    "url": "https://www.bleepingcomputer.com/news/microsoft/microsoft-august-2026-patch-tuesday-fixes-400-flaws-3-zero-days/"
                },
                {
                    "category": "external",
                    "summary": "Source - cveprojectv5",
                    "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/66xxx/CVE-2026-66806.json"
                },
                {
                    "category": "external",
                    "summary": "Source - nvd",
                    "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-66806"
                },
                {
                    "category": "external",
                    "summary": "Source - microsoft",
                    "url": "https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2026-Aug"
                },
                {
                    "category": "external",
                    "summary": "Source - ncscclear",
                    "url": "https://advisories.ncsc.nl/advisory?id=NCSC-2026-0286"
                },
                {
                    "category": "external",
                    "summary": "News - bleepingcomputer",
                    "url": "https://www.bleepingcomputer.com/news/microsoft/microsoft-august-2026-patch-tuesday-fixes-400-flaws-3-zero-days/"
                },
                {
                    "category": "external",
                    "summary": "Reference - redhat",
                    "url": "https://www.cve.org/CVERecord?id=CVE-2026-66806"
                },
                {
                    "category": "external",
                    "summary": "Reference - redhat",
                    "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-66806"
                },
                {
                    "category": "external",
                    "summary": "Reference - redhat",
                    "url": "https://issues.redhat.com/browse/ACM-38693"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd",
                    "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66806"
                }
            ],
            "remediations": [
                {
                    "category": "mitigation",
                    "details": "To mitigate this issue, ensure that the HTTPS_PROXY environment variable is configured for the affected console component. This will enable proper TLS verification for outbound connections to console.redhat.com. Consult product documentation for specific instructions on configuring proxy settings for Multicluster Engine for Kubernetes and Red Hat Advanced Cluster Management for Kubernetes. A restart of the affected services may be required for the changes to take effect.",
                    "product_ids": [
                        "CSAFPID-1441056",
                        "CSAFPID-1441080",
                        "CSAFPID-2109918",
                        "CSAFPID-2778177"
                    ]
                },
                {
                    "category": "vendor_fix",
                    "details": "Click to Run",
                    "product_ids": [
                        "CSAFPID-5137204",
                        "CSAFPID-5137205",
                        "CSAFPID-5137206",
                        "CSAFPID-5137207",
                        "CSAFPID-5137209",
                        "CSAFPID-5137210",
                        "CSAFPID-5137211",
                        "CSAFPID-5137212"
                    ]
                },
                {
                    "category": "vendor_fix",
                    "details": "5002901",
                    "product_ids": [
                        "CSAFPID-5137230",
                        "CSAFPID-5137231"
                    ],
                    "url": "https://www.microsoft.com/en-us/download/details.aspx?id=108769"
                }
            ],
            "scores": [
                {
                    "cvss_v3": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
                        "baseScore": 7.4,
                        "baseSeverity": "HIGH"
                    },
                    "products": [
                        "CSAFPID-1288319",
                        "CSAFPID-1288368",
                        "CSAFPID-1288369",
                        "CSAFPID-1441056",
                        "CSAFPID-1441080",
                        "CSAFPID-2109918",
                        "CSAFPID-2778177",
                        "CSAFPID-3105172",
                        "CSAFPID-5137204",
                        "CSAFPID-5137205",
                        "CSAFPID-5137206",
                        "CSAFPID-5137207",
                        "CSAFPID-5137209",
                        "CSAFPID-5137210",
                        "CSAFPID-5137211",
                        "CSAFPID-5137212",
                        "CSAFPID-5137230",
                        "CSAFPID-5137231",
                        "CSAFPID-8962597"
                    ]
                }
            ],
            "threats": [
                {
                    "category": "exploit_status",
                    "details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely",
                    "product_ids": [
                        "CSAFPID-5137204",
                        "CSAFPID-5137205",
                        "CSAFPID-5137206",
                        "CSAFPID-5137207",
                        "CSAFPID-5137209",
                        "CSAFPID-5137210",
                        "CSAFPID-5137211",
                        "CSAFPID-5137212",
                        "CSAFPID-5137230",
                        "CSAFPID-5137231"
                    ]
                },
                {
                    "category": "impact",
                    "details": "Information Disclosure",
                    "product_ids": [
                        "CSAFPID-5137204",
                        "CSAFPID-5137205",
                        "CSAFPID-5137206",
                        "CSAFPID-5137207",
                        "CSAFPID-5137209",
                        "CSAFPID-5137210",
                        "CSAFPID-5137211",
                        "CSAFPID-5137212",
                        "CSAFPID-5137230",
                        "CSAFPID-5137231"
                    ]
                },
                {
                    "category": "exploit_status",
                    "details": "exploited"
                }
            ],
            "title": "CVE-2026-66806"
        }
    ]
}