CVE-2022-20756

Estado: ModificadaAlta (7.5)—

A vulnerability in the RADIUS feature of Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to cause the affected system to stop processing RADIUS packets. This vulnerability is due to improper handling of certain RADIUS requests. An attacker could exploit this vulnerability by attempting to authenticate to a network or a service where the access server is using Cisco ISE as the RADIUS server.

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A successful exploit could allow the attacker to cause Cisco ISE to stop processing RADIUS requests, causing authentication/authorization timeouts, which would then result in legitimate requests being denied access. Note: To recover the ability to process RADIUS packets, a manual restart of the affected Policy Service Node (PSN) is required. See the Details section for more information.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Puntuación base: 7.5

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 1.46%
Percentil entre todas las CVEs puntuadas: 73
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)

Cisco — Identity Services Engine

CWE

CWE-399
NVD-CWE-noinfo

Referencias

JSON original (NVD)

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      "value": "A vulnerability in the RADIUS feature of Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to cause the affected system to stop processing RADIUS packets. This vulnerability is due to improper handling of certain RADIUS requests. An attacker could exploit this vulnerability by attempting to authenticate to a network or a service where the access server is using Cisco ISE as the RADIUS server. A successful exploit could allow the attacker to cause Cisco ISE to stop processing RADIUS requests, causing authentication/authorization timeouts, which would then result in legitimate requests being denied access. Note: To recover the ability to process RADIUS packets, a manual restart of the affected Policy Service Node (PSN) is required. See the Details section for more information."
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      "lang": "es",
      "value": "Una vulnerabilidad en la función RADIUS de Cisco Identity Services Engine (ISE) podría permitir a un atacante remoto no autenticado causar que el sistema afectado deje de procesar paquetes RADIUS. Esta vulnerabilidad es debido al manejo inapropiado de determinadas peticiones RADIUS. Un atacante podría explotar esta vulnerabilidad intentando autenticarse en una red o un servicio en el que el servidor de acceso esté utilizando Cisco ISE como servidor RADIUS. Una explotación con éxito podría permitir al atacante hacer que Cisco ISE dejara de procesar las peticiones RADIUS, causando tiempos de espera de autenticación/autorización, lo que resulta en que sea denegado el acceso a peticiones legítimas. Nota: Para recuperar la capacidad de procesar paquetes RADIUS, es necesario reiniciar manualmente el Policy Service Node (PSN) afectado. Consulte la sección Detalles para más información"
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