Buffer overflow in Cisco Adaptive Security Appliance Software
CVE-2025-20182
A vulnerability in the Internet Key Exchange version 2 (IKEv2) protocol processing of Cisco Adaptive Security Appliance (ASA) Software, Cisco Firepower Threat Defense (FTD) Software, Cisco IOS Software, and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient input validation when processing IKEv2 messages. An attacker could exploit this vulnerability by sending crafted IKEv2 traffic to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition on the affected device.
Vulnerability class: Buffer Overflow
EPSS: 0.005 (42.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.
Affected products
- Cisco Adaptive_security_appliance_software — versions 9.8.1, 9.8.1.5, 9.8.1.7
- Cisco Adaptive Security Appliance (Asa) Software — versions 9.12.3, 9.8.3, 9.12.1
- Cisco Firepower Threat Defense Software — versions 6.2.3.14, 6.4.0.1, 6.2.3.7
- Cisco Firepower_threat_defense — 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, 6.2.3.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- psirt@cisco.com (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-20182?
- CVE-2025-20182 is a high-severity vulnerability in Cisco Adaptive Security Appliance Software, classified under Out-of-bounds Write. CVSS score: 8.6/10. Published 2025-05-07.
- How severe is CVE-2025-20182?
- High severity. CVSS v3 base score is 8.6 out of 10.
- Is CVE-2025-20182 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.