{
    "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": "Fortinet heeft meerdere kwetsbaarheden verholpen in FortiOS.",
                "title": "Feiten"
            },
            {
                "category": "description",
                "text": "Verschillende kwetsbaarheden in FortiOS en andere Fortinet-producten kunnen leiden tot ongeoorloofde toegang, netwerkstoringen of volledige overname.\n\n- SSLVPN: onderscheppen van verkeer door gebrekkige certificaatcontrole.\n- Beheerinterface: verkrijgen van verhoogde rechten via een ongeldig token.\n- OSPF: manipuleren van routinginformatie zonder in te loggen.\n- iBGP: onverwacht routinggedrag door foutieve verwerking van gegevens.\n- SSH: omzeilen van authenticatie met gemanipuleerde aanmeldgegevens.\n- Geheugenfout: uitvoeren van code door een aanvaller met bestaande rechten.\n- WAD: laten vastlopen van proxy- en ZTNA-verbindingen.\n- HA FGSP: verkrijgen van volledige beheerderscontrole zonder account, bij bepaalde instellingen.",
                "title": "Interpretaties"
            },
            {
                "category": "description",
                "text": "Fortinet heeft updates uitgebracht om de kwetsbaarheden in FortiOS te verhelpen. Zie bijgevoegde referenties voor meer informatie.",
                "title": "Oplossingen"
            },
            {
                "category": "general",
                "text": "medium",
                "title": "Kans"
            },
            {
                "category": "general",
                "text": "high",
                "title": "Schade"
            },
            {
                "category": "general",
                "text": "Path Traversal: '../filedir'",
                "title": "CWE-24"
            },
            {
                "category": "general",
                "text": "Stack-based Buffer Overflow",
                "title": "CWE-121"
            },
            {
                "category": "general",
                "text": "Out-of-bounds Read",
                "title": "CWE-125"
            },
            {
                "category": "general",
                "text": "Numeric Truncation Error",
                "title": "CWE-197"
            },
            {
                "category": "general",
                "text": "Improper Certificate Validation",
                "title": "CWE-295"
            },
            {
                "category": "general",
                "text": "Authentication Bypass by Primary Weakness",
                "title": "CWE-305"
            },
            {
                "category": "general",
                "text": "Missing Authentication for Critical Functionality",
                "title": "CWE-306"
            }
        ],
        "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://fortiguard.fortinet.com/psirt/FG-IR-26-193"
            },
            {
                "category": "external",
                "summary": "Reference",
                "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-195"
            },
            {
                "category": "external",
                "summary": "Reference",
                "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-267"
            },
            {
                "category": "external",
                "summary": "Reference",
                "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-268"
            },
            {
                "category": "external",
                "summary": "Reference",
                "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-269"
            },
            {
                "category": "external",
                "summary": "Reference",
                "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-270"
            },
            {
                "category": "external",
                "summary": "Reference",
                "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-272"
            },
            {
                "category": "external",
                "summary": "Reference",
                "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-273"
            }
        ],
        "title": "Kwetsbaarheden verholpen in Fortinet FortiOS",
        "tracking": {
            "current_release_date": "2026-11-12T12:04:06.728740Z",
            "generator": {
                "date": "2025-08-04T16:30:00Z",
                "engine": {
                    "name": "V.A.",
                    "version": "1.3"
                }
            },
            "id": "NCSC-2026-0489",
            "initial_release_date": "2026-11-12T12:04:06.728740Z",
            "revision_history": [
                {
                    "date": "2026-11-12T12:04:06.728740Z",
                    "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": "FortiOS"
                    }
                ],
                "category": "vendor",
                "name": "Fortinet"
            }
        ]
    },
    "vulnerabilities": [
        {
            "cve": "CVE-2026-121528",
            "cwe": {
                "id": "CWE-295",
                "name": "Improper Certificate Validation"
            },
            "notes": [
                {
                    "category": "other",
                    "text": "Improper Certificate Validation",
                    "title": "CWE-295"
                },
                {
                    "category": "description",
                    "text": "An improper certificate validation vulnerability in Fortinet FortiOS versions 7.2.0 to 7.6.4 enables remote, unauthenticated attackers to conduct Man-in-the-Middle attacks on SSLVPN web portal communications.",
                    "title": "Summary"
                }
            ],
            "product_status": {
                "known_affected": [
                    "CSAFPID-1"
                ]
            },
            "references": [
                {
                    "category": "self",
                    "summary": "CVE-2026-121528 | NCSC-NL Website",
                    "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-121528.json"
                }
            ],
            "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:H",
                        "baseScore": 8.1,
                        "baseSeverity": "HIGH"
                    },
                    "products": [
                        "CSAFPID-1"
                    ]
                }
            ],
            "title": "CVE-2026-121528"
        },
        {
            "cve": "CVE-2026-121530",
            "notes": [
                {
                    "category": "description",
                    "text": "Fortinet FortiOS versions 7.6.0 to 7.6.6 contain an improper authentication vulnerability allowing remote authenticated attackers to bypass access controls and log into the GUI using invalid tokens under certain RADIUS two-factor authentication conditions.",
                    "title": "Summary"
                }
            ],
            "product_status": {
                "known_affected": [
                    "CSAFPID-1"
                ]
            },
            "references": [
                {
                    "category": "self",
                    "summary": "CVE-2026-121530 | NCSC-NL Website",
                    "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-121530.json"
                }
            ],
            "scores": [
                {
                    "cvss_v3": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C",
                        "baseScore": 6.6,
                        "baseSeverity": "MEDIUM"
                    },
                    "products": [
                        "CSAFPID-1"
                    ]
                }
            ],
            "title": "CVE-2026-121530"
        },
        {
            "cve": "CVE-2026-126253",
            "cwe": {
                "id": "CWE-305",
                "name": "Authentication Bypass by Primary Weakness"
            },
            "notes": [
                {
                    "category": "other",
                    "text": "Authentication Bypass by Primary Weakness",
                    "title": "CWE-305"
                },
                {
                    "category": "description",
                    "text": "An authentication bypass vulnerability in Fortinet FortiOS and FortiSASE OSPF daemon allows unauthenticated attackers to broadcast Link State Advertisements via specially crafted requests.",
                    "title": "Summary"
                }
            ],
            "product_status": {
                "known_affected": [
                    "CSAFPID-1"
                ]
            },
            "references": [
                {
                    "category": "self",
                    "summary": "CVE-2026-126253 | NCSC-NL Website",
                    "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-126253.json"
                }
            ],
            "scores": [
                {
                    "cvss_v3": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H/E:P/RL:U/RC:C",
                        "baseScore": 9.3,
                        "baseSeverity": "CRITICAL"
                    },
                    "products": [
                        "CSAFPID-1"
                    ]
                }
            ],
            "title": "CVE-2026-126253"
        },
        {
            "cve": "CVE-2026-126254",
            "cwe": {
                "id": "CWE-197",
                "name": "Numeric Truncation Error"
            },
            "notes": [
                {
                    "category": "other",
                    "text": "Numeric Truncation Error",
                    "title": "CWE-197"
                },
                {
                    "category": "description",
                    "text": "A numeric truncation error in multiple Fortinet FortiOS versions allows a configured iBGP neighbor to send malicious or malformed attributes to all connected routers via specially crafted requests.",
                    "title": "Summary"
                }
            ],
            "product_status": {
                "known_affected": [
                    "CSAFPID-1"
                ]
            },
            "references": [
                {
                    "category": "self",
                    "summary": "CVE-2026-126254 | NCSC-NL Website",
                    "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-126254.json"
                }
            ],
            "scores": [
                {
                    "cvss_v3": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H/E:F/RL:O/RC:C",
                        "baseScore": 9.6,
                        "baseSeverity": "CRITICAL"
                    },
                    "products": [
                        "CSAFPID-1"
                    ]
                }
            ],
            "title": "CVE-2026-126254"
        },
        {
            "cve": "CVE-2026-126255",
            "cwe": {
                "id": "CWE-24",
                "name": "Path Traversal: '../filedir'"
            },
            "notes": [
                {
                    "category": "other",
                    "text": "Path Traversal: '../filedir'",
                    "title": "CWE-24"
                },
                {
                    "category": "description",
                    "text": "A path traversal vulnerability in Fortinet FortiOS, FortiSASE, FortiProxy, and FortiPAM ssh daemon allows unauthenticated attackers to bypass authentication using specially crafted credentials.",
                    "title": "Summary"
                }
            ],
            "product_status": {
                "known_affected": [
                    "CSAFPID-1"
                ]
            },
            "references": [
                {
                    "category": "self",
                    "summary": "CVE-2026-126255 | NCSC-NL Website",
                    "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-126255.json"
                }
            ],
            "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/E:P/RL:O/RC:C",
                        "baseScore": 7.4,
                        "baseSeverity": "HIGH"
                    },
                    "products": [
                        "CSAFPID-1"
                    ]
                }
            ],
            "title": "CVE-2026-126255"
        },
        {
            "cve": "CVE-2026-126256",
            "cwe": {
                "id": "CWE-125",
                "name": "Out-of-bounds Read"
            },
            "notes": [
                {
                    "category": "other",
                    "text": "Out-of-bounds Read",
                    "title": "CWE-125"
                },
                {
                    "category": "description",
                    "text": "Multiple versions of Fortinet FortiOS contain an out-of-bounds read vulnerability that enables a remote privileged attacker to execute arbitrary code or commands via specially crafted packets.",
                    "title": "Summary"
                }
            ],
            "product_status": {
                "known_affected": [
                    "CSAFPID-1"
                ]
            },
            "references": [
                {
                    "category": "self",
                    "summary": "CVE-2026-126256 | NCSC-NL Website",
                    "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-126256.json"
                }
            ],
            "scores": [
                {
                    "cvss_v3": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H/E:P/RL:O/RC:C",
                        "baseScore": 7.4,
                        "baseSeverity": "HIGH"
                    },
                    "products": [
                        "CSAFPID-1"
                    ]
                }
            ],
            "title": "CVE-2026-126256"
        },
        {
            "cve": "CVE-2026-126258",
            "cwe": {
                "id": "CWE-121",
                "name": "Stack-based Buffer Overflow"
            },
            "notes": [
                {
                    "category": "other",
                    "text": "Stack-based Buffer Overflow",
                    "title": "CWE-121"
                },
                {
                    "category": "description",
                    "text": "A stack-based buffer overflow vulnerability in Fortinet FortiOS versions 8.0.0 and 7.6.7 allows unauthenticated attackers with wad port access to disrupt proxy or ZTNA sessions via crafted HTTP or HTTPS requests.",
                    "title": "Summary"
                }
            ],
            "product_status": {
                "known_affected": [
                    "CSAFPID-1"
                ]
            },
            "references": [
                {
                    "category": "self",
                    "summary": "CVE-2026-126258 | NCSC-NL Website",
                    "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-126258.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:P/RL:O/RC:C",
                        "baseScore": 7.5,
                        "baseSeverity": "HIGH"
                    },
                    "products": [
                        "CSAFPID-1"
                    ]
                }
            ],
            "title": "CVE-2026-126258"
        },
        {
            "cve": "CVE-2026-126259",
            "cwe": {
                "id": "CWE-306",
                "name": "Missing Authentication for Critical Functionality"
            },
            "notes": [
                {
                    "category": "other",
                    "text": "Missing Authentication for Critical Functionality",
                    "title": "CWE-306"
                },
                {
                    "category": "description",
                    "text": "A vulnerability in Fortinet FortiOS versions 7.2.0 to 8.0.0 allows unauthenticated attackers to execute super admin commands via crafted HA packets when using HA FGSP with standalone-config-sync or autoscale.",
                    "title": "Summary"
                }
            ],
            "product_status": {
                "known_affected": [
                    "CSAFPID-1"
                ]
            },
            "references": [
                {
                    "category": "self",
                    "summary": "CVE-2026-126259 | NCSC-NL Website",
                    "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-126259.json"
                }
            ],
            "scores": [
                {
                    "cvss_v3": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
                        "baseScore": 9.8,
                        "baseSeverity": "CRITICAL"
                    },
                    "products": [
                        "CSAFPID-1"
                    ]
                }
            ],
            "title": "CVE-2026-126259"
        }
    ]
}