CVE-2026-20262
Estado: AnalizadaMedia (6.5)⚠ Explotación activa💥 PoC
A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an authenticated, remote attacker to create a file or overwrite any file on the filesystem of an affected system.
This vulnerability exists because the affected software does not properly validate user-supplied input during a file upload process. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected API endpoint of the affected system. A successful exploit could allow the attacker to create or overwrite any file on the underlying operating system. This file could later be used to elevate to root. To exploit this vulnerability, the attacker must have valid credentials with at least a lower-privileged, single-task user account.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
- Puntuación base: 6.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 28%
- Percentil entre todas las CVEs puntuadas: 98
- 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).
CISA KEV — explotada activamente
- Añadida al catálogo: 15/6/2026
- Plazo de remediación: 29/6/2026
- Uso conocido en ransomware: Unknown
💥 Exploits públicos
Hay código de explotación o plantillas de detección públicos. No es lo mismo que explotación activa confirmada (KEV), pero aumenta el riesgo: parchee con prioridad.
- Prueba de concepto en GitHub (no verificada) · Lista de pruebas de concepto en GitHub
⚠️ Las pruebas de concepto de GitHub no están verificadas: algunas son falsas o contienen malware. No las ejecute nunca fuera de un laboratorio aislado.
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1210Exploitation of Remote Serviceslateral movement85 % - Impacto principal
T1565.001Stored Data Manipulationimpact90 %
Vulnerabilidad en API remoto de Cisco que permite sobrescribir archivos del sistema sin interacción del usuario (UI:N), requeriendo autenticación (PR:L). Permite manipulación de archivos y escalada posterior a root.
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-22
Referencias
JSON original (NVD)
Mostrar
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],
"published": "2026-06-15T18:16:34.820",
"references": [
{
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-arbfw-c2rZvQ",
"tags": [
"Vendor Advisory"
],
"source": "psirt@cisco.com"
},
{
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20262",
"tags": [
"US Government Resource"
],
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
}
],
"vulnStatus": "Analyzed",
"weaknesses": [
{
"type": "Secondary",
"source": "psirt@cisco.com",
"description": [
{
"lang": "en",
"value": "CWE-22"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an authenticated, remote attacker to create a file or overwrite any file on the filesystem of an affected system.\r\n\r\nThis vulnerability exists because the affected software does not properly validate user-supplied input during a file upload process. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected API endpoint of the affected system. A successful exploit could allow the attacker to create or overwrite any file on the underlying operating system. This file could later be used to elevate to root. To exploit this vulnerability, the attacker must have valid credentials with at least a lower-privileged, single-task user account."
},
{
"lang": "es",
"value": "Una vulnerabilidad en la interfaz de usuario web de Cisco Catalyst SD-WAN Manager, anteriormente SD-WAN vManage, podría permitir a un atacante remoto autenticado crear o sobrescribir cualquier archivo en el sistema de archivos de un sistema afectado.\n\nEsta vulnerabilidad existe porque el software afectado no valida correctamente la entrada proporcionada por el usuario durante un proceso de carga de archivos. Un atacante podría explotar esta vulnerabilidad enviando una solicitud HTTP manipulada a un endpoint de API afectado del sistema afectado. Un exploit exitoso podría permitir al atacante crear o sobrescribir cualquier archivo en el sistema operativo subyacente. Este archivo podría usarse posteriormente para escalar a root. Para explotar esta vulnerabilidad, el atacante debe tener credenciales válidas con al menos una cuenta de usuario de tarea única y con privilegios bajos."
}
],
"lastModified": "2026-07-24T19:10:00.160",
"cisaActionDue": "2026-06-29",
"cisaExploitAdd": "2026-06-15",
"configurations": [
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"nodes": [
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],
"sourceIdentifier": "psirt@cisco.com",
"cisaRequiredAction": "Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.",
"cisaVulnerabilityName": "Cisco Catalyst SD-WAN Manager Directory or Path Traversal Vulnerability"
}