{
  "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 de Arista EOS-platform.",
        "title": "Feiten"
      },
      {
        "category": "description",
        "text": "De kwetsbaarheid met kenmerk CVE-2026-73456 bevindt zich in de verwerking van verzoeken die via gNPSI worden aangeboden. Onder de kwetsbare configuratie kan een niet-geauthenticeerde client een kwaadaardig verzoek aanbieden waarmee code-injectie kan worden veroorzaakt. Een kwaadwillende met netwerktoegang tot de gNPSI-service kan zonder authenticatie een speciaal vervaardigd verzoek versturen waarmee willekeurige code kan worden uitgevoerd. Hierdoor kan de kwaadwillende volledige administratieve controle over de getroffen switch verkrijgen.\n\nDe kwetsbaarheid met kenmerk CVE-2026-73457, kan ertoe leiden dat gNPSI-clientgegevens, waaronder wachtwoorden, in plaintext in lokale of remote accounting logs terechtkomen. Een kwaadwillende met voldoende rechten om de betreffende logs te benaderen, kan deze gegevens vervolgens uitlezen.\nVolgens Arista is misrbuik mogelijk indien gNPSI is ingeschakeld \u00e9n de trace facility EosRpcAuth expliciet is geactiveerd. gNPSI is standaard uitgeschakeld. \n\nVolgens Arista is misbruik uitsluitend mogelijk wanneer gNPSI is ingeschakeld, in combinatie met specifieke TLS- en authenticatieconfiguraties, dan wel met een expliciet geactiveerde EosRpcAuth trace facility. Aangezien gNPSI standaard is uitgeschakeld, zijn systemen met de fabrieksinstellingen niet kwetsbaar.  ",
        "title": "Interpretaties"
      },
      {
        "category": "description",
        "text": "Arista heeft updates uitgebracht om de kwetsbaarheden 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 Control of Generation of Code (\u0027Code Injection\u0027)",
        "title": "CWE-94"
      },
      {
        "category": "general",
        "text": "Insertion of Sensitive Information into Log File",
        "title": "CWE-532"
      }
    ],
    "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/24714-security-advisory-0158"
      }
    ],
    "title": "Kwetsbaarheden verholpen in Arista EOS",
    "tracking": {
      "current_release_date": "2026-09-11T08:08:53.219642Z",
      "generator": {
        "date": "2025-08-04T16:30:00Z",
        "engine": {
          "name": "V.A.",
          "version": "1.3"
        }
      },
      "id": "NCSC-2026-0366",
      "initial_release_date": "2026-09-11T08:08:53.219642Z",
      "revision_history": [
        {
          "date": "2026-09-11T08:08:53.219642Z",
          "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": "EOS"
          }
        ],
        "category": "vendor",
        "name": "Arista"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-73456",
      "cwe": {
        "id": "CWE-532",
        "name": "Insertion of Sensitive Information into Log File"
      },
      "notes": [
        {
          "category": "other",
          "text": "Insertion of Sensitive Information into Log File",
          "title": "CWE-532"
        },
        {
          "category": "other",
          "text": "Improper Control of Generation of Code (\u0027Code Injection\u0027)",
          "title": "CWE-94"
        },
        {
          "category": "description",
          "text": "CVE-2026-73456 lacks reliable indicators of compromise, whereas CVE-2026-73457 can be identified by a specific authentication message in the Gnpsi agent log containing user and connection details.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-73456 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-73456.json"
        }
      ],
      "title": "CVE-2026-73456"
    },
    {
      "cve": "CVE-2026-73457",
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-73457 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-73457.json"
        }
      ],
      "title": "CVE-2026-73457"
    }
  ]
}