CVE-2026-20126
Estado: AnalizadaAlta (7.8)—
A vulnerability in Cisco Catalyst SD-WAN Manager could allow an authenticated, local attacker with low privileges to gain root privileges on the underlying operating system.
This vulnerability is due to an insufficient user authentication mechanism in the REST API. An attacker could exploit this vulnerability by sending a request to the REST API of the affected system. A successful exploit could allow the attacker to gain root privileges on the underlying operating system.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 7.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.31%
- Percentil entre todas las CVEs puntuadas: 21
- 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).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1068Exploitation for Privilege Escalationprivilege escalation90 %
Vulnerabilidad local (AV:L, PR:L) que permite escalada de privilegios a root. CWE-648 (incorrect user domain validation) en REST API facilita bypass de autenticación para elevar permisos.
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 (1)
CWE
- CWE-648
Referencias
JSON original (NVD)
Mostrar
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"role": "CISA Coordinator",
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{
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},
{
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],
"version": "2.0.3",
"timestamp": "2026-02-26T04:56:09.308176Z"
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],
"published": "2026-02-25T17:25:28.840",
"references": [
{
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-authbp-qwCX8D4v",
"tags": [
"Vendor Advisory"
],
"source": "psirt@cisco.com"
}
],
"vulnStatus": "Analyzed",
"weaknesses": [
{
"type": "Secondary",
"source": "psirt@cisco.com",
"description": [
{
"lang": "en",
"value": "CWE-648"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in Cisco Catalyst SD-WAN Manager could allow an authenticated, local attacker with low privileges to gain root privileges on the underlying operating system.\r\n\r\nThis vulnerability is due to an insufficient user authentication mechanism in the REST API. An attacker could exploit this vulnerability by sending a request to the REST API of the affected system. A successful exploit could allow the attacker to gain root privileges on the underlying operating system."
},
{
"lang": "es",
"value": "Una vulnerabilidad en Cisco Catalyst SD-WAN Manager podría permitir a un atacante local autenticado con pocos privilegios obtener privilegios de root en el sistema operativo subyacente.\n\nEsta vulnerabilidad se debe a un mecanismo de autenticación de usuario insuficiente en la API REST. Un atacante podría explotar esta vulnerabilidad enviando una solicitud a la API REST del sistema afectado. Un exploit exitoso podría permitir al atacante obtener privilegios de root en el sistema operativo subyacente."
}
],
"lastModified": "2026-06-17T10:17:10.020",
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}