{
    "document": {
        "category": "csaf_security_advisory",
        "csaf_version": "2.0",
        "distribution": {
            "tlp": {
                "label": "WHITE"
            }
        },
        "lang": "nl",
        "notes": [
            {
                "category": "legal_disclaimer",
                "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions:\n\n    NCSC-NL makes every reasonable effort to ensure that the content of this page 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 continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein.\n\n    NCSC-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 this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory.\n    This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings."
            },
            {
                "category": "description",
                "text": "Microsoft heeft 9 kwetsbaarheden verholpen in Exchange Server.",
                "title": "Feiten"
            },
            {
                "category": "description",
                "text": "Een kwaadwillende kan de kwetsbaarheden misbruiken om zich voor te doen als andere gebruiker, zich verhoogde rechten toe te kennen en willekeurige code uit te voeren met rechten van het proces.\n\n```\nMicrosoft Exchange Server: \n|------------------|------|-------------------------------------|\n| CVE-ID           | CVSS | Impact                              |\n|------------------|------|-------------------------------------|\n| CVE-2026-118149  | 8,80 | Uitvoeren van willekeurige code     | \n| CVE-2026-118150  | 8,80 | Verkrijgen van verhoogde rechten    | \n| CVE-2026-118151  | 7,20 | Verkrijgen van verhoogde rechten    | \n| CVE-2026-118152  | 6,50 | Voordoen als andere gebruiker       | \n| CVE-2026-118153  | 7,50 | Denial-of-Service                   | \n| CVE-2026-118154  | 8,80 | Verkrijgen van verhoogde rechten    | \n| CVE-2026-118157  | 7,20 | Verkrijgen van verhoogde rechten    | \n| CVE-2026-118207  | 8,80 | Uitvoeren van willekeurige code     | \n| CVE-2026-118208  | 7,10 | Voordoen als andere gebruiker       | \n|------------------|------|-------------------------------------|\n\n```",
                "title": "Interpretaties"
            },
            {
                "category": "description",
                "text": "Microsoft heeft updates beschikbaar gesteld waarmee de beschreven kwetsbaarheden worden verholpen. We raden u aan om deze updates te installeren. Meer informatie over de kwetsbaarheden, de installatie van de updates en eventuele work-arounds vindt u op:\n\nhttps://portal.msrc.microsoft.com/en-us/security-guidance",
                "title": "Oplossingen"
            },
            {
                "category": "general",
                "text": "medium",
                "title": "Kans"
            },
            {
                "category": "general",
                "text": "high",
                "title": "Schade"
            },
            {
                "category": "general",
                "text": "External Control of File Name or Path",
                "title": "CWE-73"
            },
            {
                "category": "general",
                "text": "Improper Control of Generation of Code",
                "title": "CWE-94"
            },
            {
                "category": "general",
                "text": "Cross-Site Request Forgery",
                "title": "CWE-352"
            },
            {
                "category": "general",
                "text": "Inefficient Algorithmic Complexity",
                "title": "CWE-407"
            },
            {
                "category": "general",
                "text": "Authorization Bypass Through User-Controlled Key",
                "title": "CWE-639"
            },
            {
                "category": "general",
                "text": "Reliance on Untrusted Inputs in a Security Decision",
                "title": "CWE-807"
            },
            {
                "category": "general",
                "text": "Weak Authentication",
                "title": "CWE-1390"
            }
        ],
        "publisher": {
            "category": "coordinator",
            "contact_details": "cert@ncsc.nl",
            "name": "Nationaal Cyber Security Centrum",
            "namespace": "https://www.ncsc.nl/"
        },
        "references": [
            {
                "category": "external",
                "summary": "Reference",
                "url": "https://portal.msrc.microsoft.com/en-us/security-guidance"
            }
        ],
        "title": "Kwetsbaarheden verholpen in Microsoft Exchange server",
        "tracking": {
            "current_release_date": "2026-11-10T20:04:46.855519Z",
            "generator": {
                "date": "2025-08-04T16:30:00Z",
                "engine": {
                    "name": "V.A.",
                    "version": "1.3"
                }
            },
            "id": "NCSC-2026-0477",
            "initial_release_date": "2026-11-10T20:04:46.855519Z",
            "revision_history": [
                {
                    "date": "2026-11-10T20:04:46.855519Z",
                    "number": "1.0.0",
                    "summary": "Initiele versie"
                }
            ],
            "status": "final",
            "version": "1.0.0"
        }
    },
    "product_tree": {
        "branches": [
            {
                "branches": [
                    {
                        "branches": [
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/*",
                                "product": {
                                    "name": "vers:unknown/*",
                                    "product_id": "CSAFPID-1"
                                }
                            }
                        ],
                        "category": "product_name",
                        "name": "Microsoft Exchange Server Subscription Edition RTM"
                    }
                ],
                "category": "vendor",
                "name": "Microsoft"
            }
        ]
    },
    "vulnerabilities": [
        {
            "cve": "CVE-2026-118149",
            "cwe": {
                "id": "CWE-94",
                "name": "Improper Control of Generation of Code"
            },
            "notes": [
                {
                    "category": "other",
                    "text": "Improper Control of Generation of Code",
                    "title": "CWE-94"
                },
                {
                    "category": "description",
                    "text": "An improper control of code generation vulnerability in Microsoft Exchange Server allows an authorized attacker to remotely execute code over a network, posing significant security risks.",
                    "title": "Summary"
                }
            ],
            "product_status": {
                "known_affected": [
                    "CSAFPID-1"
                ]
            },
            "references": [
                {
                    "category": "self",
                    "summary": "CVE-2026-118149 | NCSC-NL Website",
                    "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-118149.json"
                }
            ],
            "scores": [
                {
                    "cvss_v3": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
                        "baseScore": 8.8,
                        "baseSeverity": "HIGH"
                    },
                    "products": [
                        "CSAFPID-1"
                    ]
                }
            ],
            "title": "CVE-2026-118149"
        },
        {
            "cve": "CVE-2026-118150",
            "cwe": {
                "id": "CWE-639",
                "name": "Authorization Bypass Through User-Controlled Key"
            },
            "notes": [
                {
                    "category": "other",
                    "text": "Authorization Bypass Through User-Controlled Key",
                    "title": "CWE-639"
                },
                {
                    "category": "description",
                    "text": "An authorization bypass vulnerability in Microsoft Exchange Server involving a user-controlled key allows an authorized attacker to elevate privileges over a network.",
                    "title": "Summary"
                }
            ],
            "product_status": {
                "known_affected": [
                    "CSAFPID-1"
                ]
            },
            "references": [
                {
                    "category": "self",
                    "summary": "CVE-2026-118150 | NCSC-NL Website",
                    "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-118150.json"
                }
            ],
            "scores": [
                {
                    "cvss_v3": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
                        "baseScore": 8.8,
                        "baseSeverity": "HIGH"
                    },
                    "products": [
                        "CSAFPID-1"
                    ]
                }
            ],
            "title": "CVE-2026-118150"
        },
        {
            "cve": "CVE-2026-118151",
            "cwe": {
                "id": "CWE-73",
                "name": "External Control of File Name or Path"
            },
            "notes": [
                {
                    "category": "other",
                    "text": "External Control of File Name or Path",
                    "title": "CWE-73"
                },
                {
                    "category": "description",
                    "text": "An external control of file name or path vulnerability in Microsoft Exchange Server enables an authorized attacker to elevate privileges over a network.",
                    "title": "Summary"
                }
            ],
            "product_status": {
                "known_affected": [
                    "CSAFPID-1"
                ]
            },
            "references": [
                {
                    "category": "self",
                    "summary": "CVE-2026-118151 | NCSC-NL Website",
                    "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-118151.json"
                }
            ],
            "scores": [
                {
                    "cvss_v3": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
                        "baseScore": 7.2,
                        "baseSeverity": "HIGH"
                    },
                    "products": [
                        "CSAFPID-1"
                    ]
                }
            ],
            "title": "CVE-2026-118151"
        },
        {
            "cve": "CVE-2026-118152",
            "cwe": {
                "id": "CWE-352",
                "name": "Cross-Site Request Forgery"
            },
            "notes": [
                {
                    "category": "other",
                    "text": "Cross-Site Request Forgery",
                    "title": "CWE-352"
                },
                {
                    "category": "description",
                    "text": "A cross-site request forgery (CSRF) vulnerability in Microsoft Exchange Server allows unauthorized attackers to perform network spoofing, potentially compromising network integrity.",
                    "title": "Summary"
                }
            ],
            "product_status": {
                "known_affected": [
                    "CSAFPID-1"
                ]
            },
            "references": [
                {
                    "category": "self",
                    "summary": "CVE-2026-118152 | NCSC-NL Website",
                    "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-118152.json"
                }
            ],
            "scores": [
                {
                    "cvss_v3": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C",
                        "baseScore": 6.5,
                        "baseSeverity": "MEDIUM"
                    },
                    "products": [
                        "CSAFPID-1"
                    ]
                }
            ],
            "title": "CVE-2026-118152"
        },
        {
            "cve": "CVE-2026-118153",
            "cwe": {
                "id": "CWE-407",
                "name": "Inefficient Algorithmic Complexity"
            },
            "notes": [
                {
                    "category": "other",
                    "text": "Inefficient Algorithmic Complexity",
                    "title": "CWE-407"
                },
                {
                    "category": "description",
                    "text": "An inefficient algorithmic complexity vulnerability in Microsoft Exchange Server allows an unauthorized attacker to cause a denial of service over a network.",
                    "title": "Summary"
                }
            ],
            "product_status": {
                "known_affected": [
                    "CSAFPID-1"
                ]
            },
            "references": [
                {
                    "category": "self",
                    "summary": "CVE-2026-118153 | NCSC-NL Website",
                    "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-118153.json"
                }
            ],
            "scores": [
                {
                    "cvss_v3": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C",
                        "baseScore": 7.5,
                        "baseSeverity": "HIGH"
                    },
                    "products": [
                        "CSAFPID-1"
                    ]
                }
            ],
            "title": "CVE-2026-118153"
        },
        {
            "cve": "CVE-2026-118154",
            "cwe": {
                "id": "CWE-807",
                "name": "Reliance on Untrusted Inputs in a Security Decision"
            },
            "notes": [
                {
                    "category": "other",
                    "text": "Reliance on Untrusted Inputs in a Security Decision",
                    "title": "CWE-807"
                },
                {
                    "category": "description",
                    "text": "A vulnerability in Microsoft Exchange Server enables an authorized attacker to elevate privileges over a network by exploiting reliance on untrusted inputs in a security decision.",
                    "title": "Summary"
                }
            ],
            "product_status": {
                "known_affected": [
                    "CSAFPID-1"
                ]
            },
            "references": [
                {
                    "category": "self",
                    "summary": "CVE-2026-118154 | NCSC-NL Website",
                    "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-118154.json"
                }
            ],
            "scores": [
                {
                    "cvss_v3": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
                        "baseScore": 8.8,
                        "baseSeverity": "HIGH"
                    },
                    "products": [
                        "CSAFPID-1"
                    ]
                }
            ],
            "title": "CVE-2026-118154"
        },
        {
            "cve": "CVE-2026-118157",
            "cwe": {
                "id": "CWE-1390",
                "name": "Weak Authentication"
            },
            "notes": [
                {
                    "category": "other",
                    "text": "Weak Authentication",
                    "title": "CWE-1390"
                },
                {
                    "category": "description",
                    "text": "Weak authentication mechanisms in Microsoft Exchange Server allow an authorized attacker to elevate privileges over a network, potentially compromising system security.",
                    "title": "Summary"
                }
            ],
            "product_status": {
                "known_affected": [
                    "CSAFPID-1"
                ]
            },
            "references": [
                {
                    "category": "self",
                    "summary": "CVE-2026-118157 | NCSC-NL Website",
                    "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-118157.json"
                }
            ],
            "scores": [
                {
                    "cvss_v3": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
                        "baseScore": 7.2,
                        "baseSeverity": "HIGH"
                    },
                    "products": [
                        "CSAFPID-1"
                    ]
                }
            ],
            "title": "CVE-2026-118157"
        },
        {
            "cve": "CVE-2026-118207",
            "cwe": {
                "id": "CWE-706",
                "name": "Use of Incorrectly-Resolved Name or Reference"
            },
            "notes": [
                {
                    "category": "other",
                    "text": "Use of Incorrectly-Resolved Name or Reference",
                    "title": "CWE-706"
                },
                {
                    "category": "description",
                    "text": "Improper input validation in Microsoft Exchange Server enables an authorized attacker to remotely execute code over a network, posing a significant security risk.",
                    "title": "Summary"
                }
            ],
            "product_status": {
                "known_affected": [
                    "CSAFPID-1"
                ]
            },
            "references": [
                {
                    "category": "self",
                    "summary": "CVE-2026-118207 | NCSC-NL Website",
                    "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-118207.json"
                }
            ],
            "scores": [
                {
                    "cvss_v3": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
                        "baseScore": 8.8,
                        "baseSeverity": "HIGH"
                    },
                    "products": [
                        "CSAFPID-1"
                    ]
                }
            ],
            "title": "CVE-2026-118207"
        },
        {
            "cve": "CVE-2026-118208",
            "notes": [
                {
                    "category": "description",
                    "text": "Improper access control in Microsoft Exchange Server allows an authorized attacker to perform network spoofing, potentially compromising network integrity.",
                    "title": "Summary"
                }
            ],
            "product_status": {
                "known_affected": [
                    "CSAFPID-1"
                ]
            },
            "references": [
                {
                    "category": "self",
                    "summary": "CVE-2026-118208 | NCSC-NL Website",
                    "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-118208.json"
                }
            ],
            "scores": [
                {
                    "cvss_v3": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L/E:U/RL:O/RC:C",
                        "baseScore": 7.1,
                        "baseSeverity": "HIGH"
                    },
                    "products": [
                        "CSAFPID-1"
                    ]
                }
            ],
            "title": "CVE-2026-118208"
        }
    ]
}