CVE-2026-76466
Noticias y reportajes en Orbitaley
Una vulnerabilidad en la función de servicio de base de datos de Cisco Expressway Series podría permitir que un atacante remoto sin autenticar, con acceso de red a un dispositivo Cisco Expressway, ejecute comandos arbitrarios del sistema operativo como root.
Esta vulnerabilidad se debe al uso de cookies persistentes. Además, la validación de los certificados de cliente es insuficiente cuando el modo de verificación TLS está configurado como Enabled para la agrupación en clústeres, lo que significa que los certificados de cliente no se validan.
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Un atacante que posea las cookies podría explotar esta vulnerabilidad conectándose al servicio de base de datos e invocando comandos específicos de llamada a procedimiento remoto (RPC). Una explotación con éxito podría permitir al atacante ejecutar comandos arbitrarios como root en el sistema operativo subyacente de un dispositivo afectado.
Nota: Cisco Expressway Series hace referencia a los dispositivos Cisco Expressway Core (Expressway-C) y a los dispositivos Cisco Expressway Edge (Expressway-E).
Traducción automática del texto original de NVD (en inglés).
CVSS
- Puntuación base
- 9.8
- Versión
- 3.1
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Probabilidad de explotación (EPSS)
FIRST aún no ha puntuado esta CVE (habitual en CVEs muy recientes o rechazadas).
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
T1190Exploit Public-Facing Applicationinitial access90 % - Impacto principal
T1059Command and Scripting Interpreterexecution85 % - Impacto secundario
T1068Exploitation for Privilege Escalationprivilege escalation60 %
Vector AV:N/PR:N/UI:N permite explotación remota sin privilegios; el texto indica ejecución de comandos del SO como root. La pista T1078.001 no se sustenta: las cookies persistentes no son cuentas por defecto.
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)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
CWE
- CWE-798
Referencias
JSON original (NVD)
Mostrar
{
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{
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"role": "CISA Coordinator",
"options": [
{
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{
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},
{
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],
"version": "2.0.3",
"timestamp": "2026-10-21T16:48:49.979581Z"
}
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"integrityImpact": "HIGH",
"userInteraction": "NONE",
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"privilegesRequired": "NONE",
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},
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}
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{
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"defaultStatus": "unknown"
}
]
}
],
"published": "2026-10-21T17:19:06.813",
"references": [
{
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vcs-static-cred-hr7EWZ8t",
"source": "psirt@cisco.com"
}
],
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"type": "Secondary",
"source": "psirt@cisco.com",
"description": [
{
"lang": "en",
"value": "CWE-798"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the database service feature of Cisco Expressway Series could allow an unauthenticated, remote attacker with network access to a Cisco Expressway device to execute arbitrary operating system commands as root.\r\n\r\nThis vulnerability is due to the use of persistent cookies. Additionally, there is insufficient validation of client certificates when the TLS Verify Mode is set to Enabled for clustering, which means that client certificates are not validated. An attacker with possession of the cookies could exploit this vulnerability by connecting to the database service and invoking specific remote procedure call (RPC) commands. A successful exploit could allow the attacker to execute arbitrary commands as root on the underlying operating system of an affected device.\r\nNote: Cisco Expressway Series refers to Cisco Expressway Core (Expressway-C) devices and Cisco Expressway Edge (Expressway-E) devices."
}
],
"lastModified": "2026-10-21T18:54:37.403",
"sourceIdentifier": "psirt@cisco.com"
}