Vulnerability in Cisco Adaptive Security Appliance Software
CVE-2025-20224
A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a memory leak, resulting in a denial of service (DoS) condition. This vulnerability is due to improper parsing of IKEv2 packets. An attacker could exploit this vulnerability by sending a continuous stream of crafted IKEv2 packets to an affected device. A successful exploit could allow the attacker to partially exhaust system memory, causing system instability like being unable to establish new IKEv2 VPN sessions. A manual reboot of the device is required to recover from this condition.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.007 (51.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 51.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: +0.000
Affected products
- Cisco Adaptive Security Appliance Software — versions 9.12.1, 9.12.1.2, 9.12.1.3
- Cisco Adaptive Security Appliance (Asa) Software — versions 9.8.1, 9.8.1.5, 9.8.1.7
- Cisco Firepower Threat Defense Software — versions 6.2.3, 6.2.3.1, 6.2.3.2
- Cisco Secure Firewall Threat Defense — versions 6.2.3, 6.2.3.1, 6.2.3.10
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2025-20224?
- CVE-2025-20224 is a medium-severity vulnerability in Cisco Adaptive Security Appliance Software, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 5.8/10. Published 2025-08-14.
- How severe is CVE-2025-20224?
- Medium severity. CVSS v3 base score is 5.8 out of 10.