CVE-2021-28495
Estado: ModificadaCrítica (9.8)—
In Arista's MOS (Metamako Operating System) software which is supported on the 7130 product line, under certain conditions, user authentication can be bypassed when API access is enabled via the JSON-RPC APIs. This issue affects: Arista Metamako Operating System All releases in the MOS-0.1x train MOS-0.13 and post releases in the MOS-0.1x train MOS-0.26.6 and below releases in the MOS-0.2x train MOS-0.31.1 and below releases in the MOS-0.3x train
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 9.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.93%
- Percentil entre todas las CVEs puntuadas: 59
- Fecha de la puntuación: 6/10/2026
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)
CWE
- CWE-287
- CWE-287
Referencias
JSON original (NVD)
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"published": "2021-09-09T13:15:09.103",
"references": [
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"url": "https://www.arista.com/en/support/advisories-notices/security-advisories/12914-security-advisory-66",
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"value": "In Arista's MOS (Metamako Operating System) software which is supported on the 7130 product line, under certain conditions, user authentication can be bypassed when API access is enabled via the JSON-RPC APIs. This issue affects: Arista Metamako Operating System All releases in the MOS-0.1x train MOS-0.13 and post releases in the MOS-0.1x train MOS-0.26.6 and below releases in the MOS-0.2x train MOS-0.31.1 and below releases in the MOS-0.3x train"
},
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"value": "En el software MOS (Sistema Operativo Metamako) de Arista, que es compatible con la línea de productos 7130, en determinadas condiciones, la autenticación del usuario puede omitirse cuando se habilita el acceso a la API por medio de las API JSON-RPC. Este problema afecta a: Sistema Operativo Arista Metamako Todas las versiones MOS-0.1x train MOS-0.13 y posteriores en MOS-0.1x train MOS-0.26.6 y posteriores en MOS-0.2x train MOS-0.31.1 y posteriores en MOS-0.3x train"
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"lastModified": "2026-06-17T03:46:27.790",
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