Buffer overflow in Cisco Firewall Threat Defense (FTD) and Cisco Adaptive Security Appliance (ASA) - CVE-2025-20222
Published: August 14, 2025
Vulnerability identifier: #VU114091
CSH Severity: Medium
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-20222
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error within the RADIUS proxy feature for IPsec VPN when processing IPv6 packets. A remote attacker can pass specially crafted packets to the system, trigger memory corruption and perform a denial of service (DoS) attack.
Affected software
Cisco Firewall Threat Defense (FTD)
Cisco Adaptive Security Appliance (ASA)
Cisco Adaptive Security Appliance (ASA)
How to mitigate CVE-2025-20222
Install updates from vendor's website.
Cisco Firewall Threat Defense (FTD) - addressed in versions 7.0.7, 7.2.10, 7.4.2.3, 7.6.1, 7.7.0
Cisco Adaptive Security Appliance (ASA) - addressed in versions 9.16.4.82, 9.19.1.42, 9.20.3.10, 9.20.4, 9.22.2, 9.23.1
Cisco Adaptive Security Appliance (ASA) - addressed in versions 9.16.4.82, 9.19.1.42, 9.20.3.10, 9.20.4, 9.22.2, 9.23.1