Medium · published March 4, 2026
A vulnerability in the IKEv2 feature of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an unauthenticated, remote attacker to cause a DoS condition on an affected device that may impact the availability of services to devices elsewhere in the network.
This vulnerability is due to a memory leak when parsing IKEv2 packets. An attacker could exploit this vulnerability by sending crafted IKEv2 packets to an affected device. A successful exploit could allow the attacker to exhaust resources, causing a DoS condition that will eventually require the device to be manually reloaded.
| Product | Versions | Fixed in |
|---|---|---|
| cisco/adaptive_security_appliance_software | ≥ 9.18.1, < 9.18.4.71 | 9.18.4.71 |
| cisco/adaptive_security_appliance_software | ≥ 9.19.1, < 9.20.4.10 | 9.20.4.10 |
| cisco/adaptive_security_appliance_software | ≥ 9.22.1.1, < 9.22.2.13 | 9.22.2.13 |
| cisco/adaptive_security_appliance_software | ≥ 9.23.1, < 9.23.1.19 | 9.23.1.19 |
| cisco/secure_firewall_threat_defense | ≥ 7.2.0, < 7.2.11 | 7.2.11 |
| cisco/secure_firewall_threat_defense | ≥ 7.3.0, < 7.4.3 | 7.4.3 |
| cisco/secure_firewall_threat_defense | ≥ 7.6.0, < 7.6.4 | 7.6.4 |
| cisco/secure_firewall_threat_defense | ≥ 7.7.0, < 7.7.11 | 7.7.11 |