CVE-2026-20105
Estado: AnalizadaAlta (7.7)—
A vulnerability in the Remote Access SSL VPN functionality of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Secure Firewall Threat Defense (FTD) Software could allow an authenticated, remote attacker with a valid VPN connection to exhaust device memory resulting in a denial of service (DoS) condition.This does not affect the management or MUS interfaces.
This vulnerability is due to trusting user input without validation. An attacker could exploit this vulnerability by sending crafted packets to the Remote Access SSL VPN server. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
- Puntuación base: 7.7
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.32%
- Percentil entre todas las CVEs puntuadas: 23
- Fecha de la puntuación: 4/10/2026
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
T1210Exploitation of Remote Serviceslateral movement90 % - Impacto principal
T1499.004Application or System Exploitationimpact85 %
AV:N/PR:L indica acceso remoto con autenticación (T1210). El CWE-401 y descripción muestran agotamiento de memoria causando recarga del dispositivo, clasificado como DoS (T1499.004).
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 (2)
CWE
- CWE-401
Referencias
JSON original (NVD)
Mostrar
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"published": "2026-03-04T18:16:26.200",
"references": [
{
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-vpn-m9sx6MbC",
"tags": [
"Vendor Advisory"
],
"source": "psirt@cisco.com"
}
],
"vulnStatus": "Analyzed",
"weaknesses": [
{
"type": "Secondary",
"source": "psirt@cisco.com",
"description": [
{
"lang": "en",
"value": "CWE-401"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the Remote Access SSL VPN functionality of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Secure Firewall Threat Defense (FTD) Software could allow an authenticated, remote attacker with a valid VPN connection to exhaust device memory resulting in a denial of service (DoS) condition.This does not affect the management or MUS interfaces.\r\n\r This vulnerability is due to trusting user input without validation. An attacker could exploit this vulnerability by sending crafted packets to the Remote Access SSL VPN server. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition."
},
{
"lang": "es",
"value": "Una vulnerabilidad en la funcionalidad de VPN SSL de Acceso Remoto de Cisco Secure Firewall Adaptive Security Appliance (ASA) Software y Secure Firewall Threat Defense (FTD) Software podría permitir a un atacante remoto autenticado con una conexión VPN válida agotar la memoria del dispositivo, lo que resultaría en una condición de denegación de servicio (DoS). Esto no afecta las interfaces de gestión o MUS. Esta vulnerabilidad se debe a confiar en la entrada del usuario sin validación. Un atacante podría explotar esta vulnerabilidad enviando paquetes manipulados al servidor VPN SSL de Acceso Remoto. Un exploit exitoso podría permitir al atacante provocar que el dispositivo se reinicie, lo que resultaría en una condición de DoS."
}
],
"lastModified": "2026-08-11T19:40:47.230",
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