CVE-2025-20362: fallo de gravedad media en Cisco Secure Firewall Adaptive Security…
Publicada el · Actualizada el
100Vexday Risk Score
Corrige ahora. Ella está bajo explotación confirmada por CISA y tiene exploit funcional público.
ssvc Actcvss 6.5epss 87%
de la publicación al arma233 días
Publicada en NVD25 sept
1ª PoC+233d
CISA KEV25 sept
probabilidad de explotación
87%top 1% de las CVE
explotación observada
síCISA + VulnCheck
1 exploit(s) público(s)
Acción exigida por CISAplazo federal: 2025-09-26
The KEV due date refers to the deadline by which FCEB agencies are expected to review and begin implementing the guidance outlined in Emergency Directive (ED) 25-03 (URL listed below in Notes). Agencies must follow the mitigation steps provided by CISA (URL listed below in Notes) and vendor’s instructions (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.
En resumen
Una falla en Cisco Secure Firewall (ASA y FTD) permite que atacantes accedan a páginas de gestión de VPN sin iniciar sesión enviando solicitudes web especialmente diseñadas. Esto podría exponer información sensible de VPN o permitir cambios de configuración no autorizados.
Detalle técnico
Bypass de autorización (CWE-862) en el servidor web de VPN debido a validación inadecuada de entrada en solicitudes HTTP(S). Un atacante remoto no autenticado puede enviar solicitudes HTTP elaboradas para acceder a puntos finales de VPN restringidos que deberían requerir autenticación, potencialmente provocando divulgación de información o configuración no autorizada.
Resumen generado y traducido por IA a partir de la descripción oficial.
Update: On November 5, 2025, Cisco became aware of a new attack variant against devices running Cisco Secure ASA Software or Cisco Secure FTD Software releases that are affected by CVE-2025-20333 and CVE-2025-20362. This attack can cause unpatched devices to unexpectedly reload, leading to denial of service (DoS) conditions. Cisco strongly recommends that all customers upgrade to the fixed software releases that are listed in the Fixed Software ["#fs"] section of this advisory.
A vulnerability in the VPN web server of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to access restricted URL endpoints that are related to remote access VPN that should otherwise be inaccessible without authentication.
This vulnerability is due to improper validation of user-supplied input in HTTP(S) requests. An attacker could exploit this vulnerability by sending crafted HTTP requests to a targeted web server on a device. A successful exploit could allow the attacker to access a restricted URL without authentication.