CVE Watch11 ago 2026

CVE-2024-20481

Cisco ASA and FTD Denial-of-Service Vulnerability

CVSS

5.8

Medio

EPSS

15.9%

p97

KEV

SÍ

24 oct 2024

Exploit Today

0-100

Publicado: 23 oct 2024 · Última mod.: 11 ago 2026 · CWE-772

EPSS · 30d

15.9%EPSS · 30 días15.9%

2026-08-032026-08-31

Ficha del catálogo KEV

Producto

Cisco / Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)

Vulnerabilidad

Cisco ASA and FTD Denial-of-Service Vulnerability

Añadido a KEV

24 oct 2024

Remediar antes de

14 nov 2024

Uso conocido en ransomware

Descripción resumida

Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) contain a missing release of resource after effective lifetime vulnerability that could allow an unauthenticated, remote attacker to cause a denial-of-service (DoS) of the RAVPN service.

Acción requerida

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Notas

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-bf-dos-vDZhLqrW ; https://nvd.nist.gov/vuln/detail/CVE-2024-20481

Descripción técnica

A vulnerability in the Remote Access VPN (RAVPN) service of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) of the RAVPN service. This vulnerability is due to resource exhaustion. An attacker could exploit this vulnerability by sending a large number of VPN authentication requests to an affected device. A successful exploit could allow the attacker to exhaust resources, resulting in a DoS of the RAVPN service on the affected device. Depending on the impact of the attack, a reload of the device may be required to restore the RAVPN service. Services that are not related to VPN are not affected. Cisco Talos discussed these attacks in the blog post Large-scale brute-force activity targeting VPNs, SSH services with commonly used login credentials.

Referencias oficiales

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