CVE-2024-20434
Estado: AnalizadaMedia (4.3)—
A vulnerability in Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on the control plane of an affected device.
This vulnerability is due to improper handling of frames with VLAN tag information. An attacker could exploit this vulnerability by sending crafted frames to an affected device. A successful exploit could allow the attacker to render the control plane of the affected device unresponsive.
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The device would not be accessible through the console or CLI, and it would not respond to ping requests, SNMP requests, or requests from other control plane protocols. Traffic that is traversing the device through the data plane is not affected. A reload of the device is required to restore control plane services.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- Puntuación base: 4.3
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.26%
- Percentil entre todas las CVEs puntuadas: 16
- 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-190
- CWE-190
Referencias
JSON original (NVD)
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"value": "A vulnerability in Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on the control plane of an affected device.\r\n\r This vulnerability is due to improper handling of frames with VLAN tag information. An attacker could exploit this vulnerability by sending crafted frames to an affected device. A successful exploit could allow the attacker to render the control plane of the affected device unresponsive. The device would not be accessible through the console or CLI, and it would not respond to ping requests, SNMP requests, or requests from other control plane protocols. Traffic that is traversing the device through the data plane is not affected. A reload of the device is required to restore control plane services."
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"value": "Una vulnerabilidad en el software Cisco IOS XE podría permitir que un atacante adyacente no autenticado provoque una condición de denegación de servicio (DoS) en el plano de control de un dispositivo afectado. Esta vulnerabilidad se debe a un manejo inadecuado de tramas con información de etiqueta VLAN. Un atacante podría aprovechar esta vulnerabilidad enviando tramas manipuladas a un dispositivo afectado. Una explotación exitosa podría permitir al atacante dejar inoperante el plano de control del dispositivo afectado. El dispositivo no sería accesible a través de la consola o la CLI, y no respondería a las solicitudes de ping, solicitudes SNMP o solicitudes de otros protocolos del plano de control. El tráfico que atraviesa el dispositivo a través del plano de datos no se ve afectado. Se requiere una recarga del dispositivo para restaurar los servicios del plano de control."
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