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Crítico CVE-2026-20307 Multiple Vendors

[CVE-2026-20307] A vulnerability in the web-based management interface of Cisco ISE could allow an authenticated, rem…

Vulnerabilidad · Publicado 16/09/2026

9.9
CVSS 3.x
04 Medio7 Alto9 Crítico10
Severidad: Crítico
Resumen ejecutivo

A vulnerability in the web-based management interface of Cisco ISE could allow an authenticated, remote attacker to execute arbitrary commands on the underlying operating system of an affected device. To exploit this vulnerability, the attacker must have at least low-privileged administrative credentials.

This vulnerability is due to insecure deserialization of a user-supplied Java byte stream.…

Descripción técnica

Descripción técnica

A vulnerability in the web-based management interface of Cisco ISE could allow an authenticated, remote attacker to execute arbitrary commands on the underlying operating system of an affected device. To exploit this vulnerability, the attacker must have at least low-privileged administrative credentials. This vulnerability is due to insecure deserialization of a user-supplied Java byte stream. An attacker could exploit this vulnerability by sending a crafted serialized Java object to the web-based management interface of an affected device. A successful exploit could allow the attacker to execute arbitrary code on the device and elevate privileges to root. In single-node deployments, successful exploitation of this vulnerability could cause the affected ISE node to become unavailable, resulting in a denial of service (DoS) condition. In that condition, endpoints that have not already authenticated would be unable to access the network until the node is restored.

Puntuación CVSS

Score: 9.9/10 — Severidad: CRITICAL — Estado NIST: Received

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Debilidades (CWE)

CWE-502

Fuente oficial

Publicado en NIST NVD.

¿Qué hacer?
  • Revisar el aviso oficial del fabricante y aplicar los parches o mitigaciones disponibles
  • Consultar las referencias en NIST NVD para actualizaciones de estado
  • Priorizar según el score CVSS y la exposición de los sistemas afectados
Esta alerta fue generada automáticamente a partir del NVD del NIST.