CVE-2026-20182criticalbajo ataqueCWE-287

CVE-2026-20182: fallo crítico en Cisco Catalyst SD-WAN Controller

Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability

Publicada el · Actualizada el

100Vexday Risk Score

Corrige ahora. Ella está bajo explotación confirmada por CISA y tiene exploit funcional público.

ssvc Actcvss 10epss 92%
de la publicación al arma8 días
Publicada en NVD14 may
1ª PoC+8d
metasploit7 may
CISA KEV14 may
probabilidad de explotación
92%top 1% de las CVE
explotación observada
síCISA + VulnCheck
6 exploit(s) público(s)
Acción exigida por CISAplazo federal: 2026-05-17

Please adhere to CISA’s guidelines to assess exposure and mitigate risks associated with Cisco SD-WAN devices as outlined in CISA’s Emergency Directive 26-03 (URL listed below in Notes) and CISA’s Hunt & Hardening Guidance for Cisco SD-WAN Devices (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available.

En resumen

Un defecto en Cisco Catalyst SD-WAN Controller permite que un atacante omita la autenticación y obtenga acceso de administrador sin credenciales válidas. Esto significa que los atacantes pueden tomar control del sistema y modificar configuraciones críticas de la red.

Detalle técnico

La vulnerabilidad existe en el mecanismo de autenticación de pares (peering) de Cisco Catalyst SD-WAN Controller, Manager y Validator. Un atacante remoto no autenticado puede enviar solicitudes especialmente elaboradas para eludir la autenticación y obtener una cuenta interna de alto privilegio, permitiendo acceso no autorizado a NETCONF para manipulación arbitraria de la configuración del fabric SD-WAN.

Resumen generado y traducido por IA a partir de la descripción oficial.

El análisis completo de esta CVE está disponible en portugués →

May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and fixed after the was disclosed in February 2026. This new advisory is for a new vulnerability in the control connection handshaking. The section of this advisory includes Show Control Connections guidance to help with system checks.  A vulnerability in the peering authentication in Cisco Catalyst SD-WAN Controller, formerly SD-WAN vSmart, Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, and Cisco Catalyst SD-WAN Validator, formerly SD-WAN vBond, could allow an unauthenticated, remote attacker to bypass authentication and obtain administrative privileges on an affected system. This vulnerability exists because the peering authentication mechanism in an affected system is not working properly. An attacker could exploit this vulnerability by sending crafted requests to the affected system. A successful exploit could allow the attacker to log in to an affected Cisco Catalyst SD-WAN Controller as an internal, high-privileged, non-root user account. Using this account, the attacker could access NETCONF, which would then allow the attacker to manipulate network configuration for the SD-WAN fabric.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
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