CVE-2025-20222

HIGH

Cisco Secure Firewall ASA/FTD - DoS

Title source: llm
STIX 2.1

Description

A vulnerability in the RADIUS proxy feature for the IPsec VPN feature of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. This vulnerability is due to improper processing of IPv6 packets. An attacker could exploit this vulnerability by sending IPv6 packets over an IPsec VPN connection to an affected device. A successful exploit could allow the attacker to trigger a reload of the device, resulting in a DoS condition.

References (1)

Core 1

Scores

CVSS v3 8.6
EPSS 0.0015
EPSS Percentile 35.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-120
Status published
Products (50)
Cisco/Cisco Firepower Threat Defense Software 6.2.3
Cisco/Cisco Firepower Threat Defense Software 6.2.3.1
Cisco/Cisco Firepower Threat Defense Software 6.2.3.10
Cisco/Cisco Firepower Threat Defense Software 6.2.3.11
Cisco/Cisco Firepower Threat Defense Software 6.2.3.12
Cisco/Cisco Firepower Threat Defense Software 6.2.3.13
Cisco/Cisco Firepower Threat Defense Software 6.2.3.14
Cisco/Cisco Firepower Threat Defense Software 6.2.3.15
Cisco/Cisco Firepower Threat Defense Software 6.2.3.16
Cisco/Cisco Firepower Threat Defense Software 6.2.3.17
... and 40 more
Published Aug 14, 2025
Tracked Since Feb 18, 2026