Vulnerability in Cisco Adaptive Security Appliance Software
CVE-2026-20014
A vulnerability in the IKEv2 feature of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an authenticated, remote attacker with valid VPN user credentials to cause a DoS condition on an affected device that may also impact the availability of services to devices elsewhere in the network. This vulnerability is due to the improper processing of IKEv2 packets. An attacker could exploit this vulnerability by sending crafted, authenticated IKEv2 packets to an affected device. A successful exploit could allow the attacker to exhaust memory, causing the device to reload.
EPSS: 0.003 (20.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H.
Affected products
- Cisco Adaptive_security_appliance_software
- Cisco Secure Firewall Adaptive Security Appliance (Asa) Software — versions 9.18.1, 9.18.1.3, 9.18.2
- Cisco Secure Firewall Threat Defense (Ftd) Software — versions 7.2.0, 7.2.0.1, 7.2.1
- Cisco Firepower_threat_defense_software
- Cisco Secure_firewall_threat_defense
Weakness classification (CWE)
References
- psirt@cisco.com (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-20014?
- CVE-2026-20014 is a high-severity vulnerability in Cisco Adaptive Security Appliance Software, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 7.7/10. Published 2026-03-04.
- How severe is CVE-2026-20014?
- High severity. CVSS v3 base score is 7.7 out of 10.