CVE-2024-20426
Last modified
CVE-2024-20426 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. A vulnerability in the Internet Key Exchange version 2 (IKEv2) protocol for VPN termination of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) 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. An attacker could exploit this vulnerability by sending crafted IKEv2 traffic to an affected device. EPSS estimates a 0.54% chance of exploitation in the next 30 days.
Description
A vulnerability in the Internet Key Exchange version 2 (IKEv2) protocol for VPN termination of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) 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. 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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Adaptive Security Appliance Software | 9.18.1 |
| Cisco | Adaptive Security Appliance Software | 9.18.1.3 |
| Cisco | Adaptive Security Appliance Software | 9.18.2 |
| Cisco | Adaptive Security Appliance Software | 9.18.2.5 |
| Cisco | Adaptive Security Appliance Software | 9.18.2.7 |
| Cisco | Adaptive Security Appliance Software | 9.18.2.8 |
| Cisco | Adaptive Security Appliance Software | 9.18.3 |
| Cisco | Adaptive Security Appliance Software | 9.18.3.39 |
| Cisco | Adaptive Security Appliance Software | 9.18.3.46 |
| Cisco | Adaptive Security Appliance Software | 9.18.3.53 |
| Cisco | Adaptive Security Appliance Software | 9.18.3.55 |
| Cisco | Adaptive Security Appliance Software | 9.18.3.56 |
| Cisco | Adaptive Security Appliance Software | 9.18.4 |
| Cisco | Adaptive Security Appliance Software | 9.18.4.5 |
| Cisco | Adaptive Security Appliance Software | 9.18.4.8 |
| Cisco | Adaptive Security Appliance Software | 9.18.4.22 |
| Cisco | Adaptive Security Appliance Software | 9.18.4.24 |
| Cisco | Adaptive Security Appliance Software | 9.18.4.29 |
| Cisco | Adaptive Security Appliance Software | 9.19.1 |
| Cisco | Adaptive Security Appliance Software | 9.19.1.5 |
| Cisco | Adaptive Security Appliance Software | 9.19.1.9 |
| Cisco | Adaptive Security Appliance Software | 9.19.1.12 |
| Cisco | Adaptive Security Appliance Software | 9.19.1.18 |
| Cisco | Adaptive Security Appliance Software | 9.19.1.22 |
| Cisco | Adaptive Security Appliance Software | 9.19.1.24 |
| Cisco | Adaptive Security Appliance Software | 9.19.1.27 |
| Cisco | Adaptive Security Appliance Software | 9.19.1.28 |
| Cisco | Adaptive Security Appliance Software | 9.19.1.31 |
| Cisco | Adaptive Security Appliance Software | 9.20.1 |
| Cisco | Adaptive Security Appliance Software | 9.20.1.5 |
| Cisco | Adaptive Security Appliance Software | 9.20.2 |
| Cisco | Adaptive Security Appliance Software | 9.20.2.10 |
| Cisco | Adaptive Security Appliance Software | 9.20.2.21 |
| Cisco | Secure Firewall Threat Defense | 7.2.0 |
| Cisco | Secure Firewall Threat Defense | 7.2.0.1 |
| Cisco | Secure Firewall Threat Defense | 7.2.1 |
| Cisco | Secure Firewall Threat Defense | 7.2.2 |
| Cisco | Secure Firewall Threat Defense | 7.2.3 |
| Cisco | Secure Firewall Threat Defense | 7.2.4 |
| Cisco | Secure Firewall Threat Defense | 7.2.4.1 |
| Cisco | Secure Firewall Threat Defense | 7.2.5 |
| Cisco | Secure Firewall Threat Defense | 7.2.5.1 |
| Cisco | Secure Firewall Threat Defense | 7.2.5.2 |
| Cisco | Secure Firewall Threat Defense | 7.2.6 |
| Cisco | Secure Firewall Threat Defense | 7.2.7 |
| Cisco | Secure Firewall Threat Defense | 7.2.8 |
| Cisco | Secure Firewall Threat Defense | 7.2.8.1 |
| Cisco | Secure Firewall Threat Defense | 7.3.0 |
| Cisco | Secure Firewall Threat Defense | 7.3.1 |
| Cisco | Secure Firewall Threat Defense | 7.3.1.1 |
Showing 50 of 54 affected configurations. See NVD for the full list.
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
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