CVE-2021-1588
Estado: ModificadaAlta (8.6)—
A vulnerability in the MPLS Operation, Administration, and Maintenance (OAM) feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper input validation when an affected device is processing an MPLS echo-request or echo-reply packet. An attacker could exploit this vulnerability by sending malicious MPLS echo-request or echo-reply packets to an interface that is enabled for MPLS forwarding on the affected device. A successful exploit could allow the attacker to cause the MPLS OAM process to crash and restart multiple times, causing the affected device to reload and resulting in a DoS condition.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
- Puntuación base: 8.6
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 1.32%
- Percentil entre todas las CVEs puntuadas: 70
- Fecha de la puntuación: 7/10/2026
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-126
- CWE-20, CWE-125
Referencias
JSON original (NVD)
Mostrar
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"matchCriteriaId": "1BC5293E-F2B4-46DC-85DA-167EA323FCFD"
},
{
"criteria": "cpe:2.3:h:cisco:nexus_9396tx:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "EA022E77-6557-4A33-9A3A-D028E2DB669A"
},
{
"criteria": "cpe:2.3:h:cisco:nexus_9508:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "DDC2F709-AFBE-48EA-A3A2-DA1134534FB6"
}
],
"operator": "OR"
}
],
"operator": "AND"
}
],
"sourceIdentifier": "psirt@cisco.com"
}