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CVE-2021-28498

Estado: ModificadaAlta (7.8)—

In Arista's MOS (Metamako Operating System) software which is supported on the 7130 product line, user enable passwords set in clear text could result in unprivileged users getting complete access to the systems. This issue affects: Arista Metamako Operating System MOS-0.13 and post releases in the MOS-0.1x train MOS-0.26.6 and prior releases in the MOS-0.2x train MOS-0.31.1 and prior releases in the MOS-0.3x train

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Arista — Metamako Operating System

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-28498",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.2,
          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
          "authentication": "NONE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
        "impactScore": 10,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 3.9,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "psirt@arista.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 8.7,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 6,
        "exploitabilityScore": 2
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
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        "impactScore": 5.9,
        "exploitabilityScore": 1.8
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  "affected": [
    {
      "source": "psirt@arista.com",
      "affectedData": [
        {
          "vendor": "Arista",
          "product": "Metamako Operating System",
          "versions": [
            {
              "status": "affected",
              "version": "MOS-0.13",
              "lessThan": "MOS-0.13*",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "MOS-0.26.7",
              "lessThan": "MOS-0.26.7",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "MOS-0.32.0",
              "lessThan": "MOS-0.32.0",
              "versionType": "custom"
            }
          ],
          "platforms": [
            "Arista 7130 Systems running MOS"
          ]
        }
      ]
    }
  ],
  "published": "2021-09-09T13:15:09.433",
  "references": [
    {
      "url": "https://www.arista.com/en/support/advisories-notices/security-advisories/12912-security-advisory-64",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "source": "psirt@arista.com"
    },
    {
      "url": "https://www.arista.com/en/support/advisories-notices/security-advisories/12912-security-advisory-64",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "psirt@arista.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-255"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-522"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In Arista's MOS (Metamako Operating System) software which is supported on the 7130 product line, user enable passwords set in clear text could result in unprivileged users getting complete access to the systems. This issue affects: Arista Metamako Operating System MOS-0.13 and post releases in the MOS-0.1x train MOS-0.26.6 and prior releases in the MOS-0.2x train MOS-0.31.1 and prior releases in the MOS-0.3x train"
    },
    {
      "lang": "es",
      "value": "En el software MOS (Metamako Operating System) de Arista, compatible con la línea de productos 7130, las contraseñas de habilitación de usuarios ajustadas en texto sin cifrar podrían resultar en que usuarios no privilegiados obtuvieran acceso completo a los sistemas. Este problema afecta a: Sistema Operativo Arista Metamako MOS-0.13 y versiones posteriores en MOS-0.1x train MOS-0.26.6 y versiones anteriores en MOS-0.2x train MOS-0.31.1 y versiones anteriores en MOS-0.3x train"
    }
  ],
  "lastModified": "2026-06-17T03:46:28.173",
  "configurations": [
    {
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  "sourceIdentifier": "psirt@arista.com"
}