Vulnerability in Cisco Adaptive Security Appliance (Asa) Software
CVE-2025-20225
A vulnerability in the Internet Key Exchange Version 2 (IKEv2) feature of Cisco IOS Software, IOS XE Software, 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 a lack of proper processing of IKEv2 packets. An attacker could exploit this vulnerability by sending crafted IKEv2 packets to an affected device. In the case of Cisco IOS and IOS XE Software, a successful exploit could allow the attacker to cause the device to reload unexpectedly. In the case of Cisco ASA and FTD Software, a successful exploit could allow the attacker to partially exhaust system memory, causing system instability such as 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 (51.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 51.9% 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 (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 iOS Xe Software — versions 3.3.0SG, 3.3.2SG, 3.3.1SG
- Cisco iOS — versions 15.1(2)T, 15.1(1)T4, 15.1(3)T2
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2025-20225?
- CVE-2025-20225 is a medium-severity vulnerability in Cisco Adaptive Security Appliance (Asa) Software, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 5.8/10. Published 2025-08-14.
- How severe is CVE-2025-20225?
- Medium severity. CVSS v3 base score is 5.8 out of 10.