{
    "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": "Arista heeft kwetsbaarheden verholpen in VeloCloud Orchestrator On-Prem.",
                "title": "Feiten"
            },
            {
                "category": "description",
                "text": "De kwetsbaarheden bevinden zich in de on-premises deployment van VeloCloud Orchestrator. Er is een ongeauthenticeerd eindpunt dat het mogelijk maakt om de certificate authority te roteren. Daarnaast is er een bash command injection kwetsbaarheid die een aanvaller in staat stelt om op afstand willekeurige OS-commando's uit te voeren. Hierdoor kan de vertrouwelijkheid, integriteit en beschikbaarheid van het systeem worden aangetast. Er is geen eenduidige indicator van compromittering, maar het wordt aanbevolen om bij vermoedens van misbruik ongebruikelijke web- en backendlogs te onderzoeken, en kwaadaardige IP-adressen te blokkeren en logs te bewaren.\n\nHoewel er nog geen publieke PoC code beschikbaar is, wordt de kwetsbaarheid volgens Arista wel al actief misbruikt.",
                "title": "Interpretaties"
            },
            {
                "category": "description",
                "text": "Arista heeft updates uitgebracht om de kwetsbaarheden in VeloCloud Orchestrator On-Prem 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": "Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')",
                "title": "CWE-78"
            }
        ],
        "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://www.arista.com/en/support/advisories-notices/security-advisory/24364-security-advisory-0144"
            }
        ],
        "title": "Kwetsbaarheden verholpen in Arista VeloCloud Orchestrator On-Prem",
        "tracking": {
            "current_release_date": "2026-08-11T09:13:09.897543Z",
            "generator": {
                "date": "2025-08-04T16:30:00Z",
                "engine": {
                    "name": "V.A.",
                    "version": "1.3"
                }
            },
            "id": "NCSC-2026-0281",
            "initial_release_date": "2026-08-11T09:13:09.897543Z",
            "revision_history": [
                {
                    "date": "2026-08-11T09:13:09.897543Z",
                    "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": "VeloCloud Orchestrator On-Prem"
                    }
                ],
                "category": "vendor",
                "name": "Arista Networks"
            }
        ]
    },
    "vulnerabilities": [
        {
            "cve": "CVE-2026-16812",
            "cwe": {
                "id": "CWE-78",
                "name": "Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')"
            },
            "notes": [
                {
                    "category": "other",
                    "text": "Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')",
                    "title": "CWE-78"
                },
                {
                    "category": "description",
                    "text": "Arista VeloCloud Orchestrator On-Prem suffers from critical vulnerabilities including an unauthenticated certificate authority rotation endpoint and a bash command injection flaw enabling remote code execution, impacting system confidentiality, integrity, and availability.",
                    "title": "Summary"
                },
                {
                    "category": "general",
                    "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/S:P",
                    "title": "CVSSV4"
                }
            ],
            "product_status": {
                "known_affected": [
                    "CSAFPID-1"
                ]
            },
            "references": [
                {
                    "category": "self",
                    "summary": "CVE-2026-16812 | NCSC-NL Website",
                    "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-16812.json"
                }
            ],
            "scores": [
                {
                    "cvss_v3": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
                        "baseScore": 10.0,
                        "baseSeverity": "CRITICAL"
                    },
                    "products": [
                        "CSAFPID-1"
                    ]
                }
            ],
            "title": "CVE-2026-16812"
        }
    ]
}