CVE-2026-20127
Estado: AnalizadaCrítica (10)⚠ Explotación activa
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.
Detalles técnicos trazas, registros y código del informe original
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 an 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
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- Puntuación base: 10
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 88%
- Percentil entre todas las CVEs puntuadas: 100
- Fecha de la puntuación: 5/10/2026
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).
CISA KEV — explotada activamente
- Añadida al catálogo: 25/2/2026
- Plazo de remediación: 27/2/2026
- Uso conocido en ransomware: Unknown
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1190Exploit Public-Facing Applicationinitial access95 % - Impacto principal
T1078Valid Accountsstealth · persistence · privilege escalation · initial access95 % - Impacto secundario
T1565.001Stored Data Manipulationimpact85 %
Vector AV:N/PR:N/UI:N sin autenticación requerida: T1190. Bypass autenticación y acceso como usuario privilegiado (T1078) con capacidad de manipular configuración de red mediante NETCONF (T1565.001).
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 (3)
CWE
- CWE-287
- CWE-287
Referencias
JSON original (NVD)
Mostrar
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"published": "2026-02-25T17:25:29.477",
"references": [
{
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa-EHchtZk",
"tags": [
"Vendor Advisory"
],
"source": "psirt@cisco.com"
},
{
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20127",
"tags": [
"US Government Resource"
],
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
}
],
"vulnStatus": "Analyzed",
"weaknesses": [
{
"type": "Secondary",
"source": "psirt@cisco.com",
"description": [
{
"lang": "en",
"value": "CWE-287"
}
]
},
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-287"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "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.\r\n\r\nThis 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 an 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. "
},
{
"lang": "es",
"value": "Una vulnerabilidad en la autenticación de emparejamiento en Cisco Catalyst SD-WAN Controller, anteriormente SD-WAN vSmart, y Cisco Catalyst SD-WAN Manager, anteriormente SD-WAN vManage, podría permitir a un atacante remoto no autenticado eludir la autenticación y obtener privilegios administrativos en un sistema afectado.\n\nEsta vulnerabilidad existe porque el mecanismo de autenticación de emparejamiento en un sistema afectado no funciona correctamente. Un atacante podría explotar esta vulnerabilidad enviando solicitudes manipuladas a un sistema afectado. Un exploit exitoso podría permitir al atacante iniciar sesión en un Cisco Catalyst SD-WAN Controller afectado como una cuenta de usuario interna, con altos privilegios y no root. Usando esta cuenta, el atacante podría acceder a NETCONF, lo que luego permitiría al atacante manipular la configuración de red para la estructura SD-WAN."
}
],
"lastModified": "2026-06-17T15:06:12.607",
"cisaActionDue": "2026-02-27",
"cisaExploitAdd": "2026-02-25",
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"cisaRequiredAction": "Please adhere to CISA’s guidelines to assess exposure and mitigate risks associated with Cisco SD-WAN devices as outlines 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.",
"cisaVulnerabilityName": "Cisco Catalyst SD-WAN Controller and Manager Authentication Bypass Vulnerability"
}