CVE-2026-20010
Estado: AplazadaAlta (7.4)—
A vulnerability in the Link Layer Discovery Protocol (LLDP) feature of Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause the LLDP process to restart, which could cause an affected device to reload unexpectedly.
This vulnerability is due to improper handling of specific fields in an LLDP frame. An attacker could exploit this vulnerability by sending a crafted LLDP packet to an interface of an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a denial of service (DoS) condition.
Leer descripción completaMostrar menos
Note: LLDP is a Layer 2 link protocol. To exploit this vulnerability, an attacker would need to be directly connected to an interface of an affected device, either physically or logically (for example, through a Layer 2 Tunnel configured to transport the LLDP protocol).
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
- Puntuación base: 7.4
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.18%
- Percentil entre todas las CVEs puntuadas: 6
- 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).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1210Exploitation of Remote Serviceslateral movement85 % - Impacto principal
T1499.004Application or System Exploitationimpact90 %
AV:A requiere red adyacente (T1210). El atacante envía un paquete LLDP malformado que causa reinicio del dispositivo, afectando disponibilidad (T1499.004 - Endpoint Denial of Service).
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
CWE
- CWE-805
Referencias
JSON original (NVD)
Mostrar
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"value": "A vulnerability in the Link Layer Discovery Protocol (LLDP) feature of Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause the LLDP process to restart, which could cause an affected device to reload unexpectedly.\r\n\r\nThis vulnerability is due to improper handling of specific fields in an LLDP frame. An attacker could exploit this vulnerability by sending a crafted LLDP packet to an interface of an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a denial of service (DoS) condition.\r\nNote: LLDP is a Layer 2 link protocol. To exploit this vulnerability, an attacker would need to be directly connected to an interface of an affected device, either physically or logically (for example, through a Layer 2 Tunnel configured to transport the LLDP protocol)."
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"value": "Una vulnerabilidad en la función del Protocolo de Descubrimiento de Capa de Enlace (LLDP) del software Cisco NX-OS podría permitir a un atacante adyacente no autenticado provocar el reinicio del proceso LLDP, lo que podría causar que un dispositivo afectado se recargue inesperadamente.\n\nEsta vulnerabilidad se debe al manejo inadecuado de campos específicos en una trama LLDP. Un atacante podría explotar esta vulnerabilidad enviando un paquete LLDP manipulado a una interfaz de un dispositivo afectado. Un exploit exitoso podría permitir al atacante provocar la recarga del dispositivo, lo que resultaría en una condición de denegación de servicio (DoS).\nNota: LLDP es un protocolo de enlace de Capa 2. Para explotar esta vulnerabilidad, un atacante necesitaría estar directamente conectado a una interfaz de un dispositivo afectado, ya sea física o lógicamente (por ejemplo, a través de un túnel de Capa 2 configurado para transportar el protocolo LLDP)."
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