CVE-2026-20015
Last modified
CVE-2026-20015 is a medium-severity vulnerability rated 5.8/10 on the CVSS scale. 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. EPSS estimates a 0.30% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Adaptive Security Appliance Software | >= 9.18.1, < 9.18.4.71 |
| Cisco | Adaptive Security Appliance Software | >= 9.19.1, < 9.20.4.10 |
| Cisco | Adaptive Security Appliance Software | >= 9.22.1.1, < 9.22.2.13 |
| Cisco | Adaptive Security Appliance Software | >= 9.23.1, < 9.23.1.19 |
| Cisco | Secure Firewall Threat Defense | >= 7.2.0, < 7.2.11 |
| Cisco | Secure Firewall Threat Defense | >= 7.3.0, < 7.4.3 |
| Cisco | Secure Firewall Threat Defense | >= 7.6.0, < 7.6.4 |
| Cisco | Secure Firewall Threat Defense | >= 7.7.0, < 7.7.11 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
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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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