CVE-2026-20101
Last modified
CVE-2026-20101 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. A vulnerability in the SAML 2.0 single sign-on (SSO) feature of Cisco Secure Firewall ASA Software and Secure FTD Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a DoS condition. This vulnerability is due to insufficient error checking when processing SAML messages. An attacker could exploit this vulnerability by sending crafted SAML messages to the SAML service. EPSS estimates a 0.35% chance of exploitation in the next 30 days.
Description
A vulnerability in the SAML 2.0 single sign-on (SSO) feature of Cisco Secure Firewall ASA Software and Secure FTD Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a DoS condition. This vulnerability is due to insufficient error checking when processing SAML messages. An attacker could exploit this vulnerability by sending crafted SAML messages to the SAML service. 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 | >= 9.12.1, < 9.16.4.85 |
| Cisco | Adaptive Security Appliance Software | >= 9.17.1, < 9.18.4.66 |
| Cisco | Adaptive Security Appliance Software | >= 9.19.1, < 9.20.4 |
| Cisco | Adaptive Security Appliance Software | >= 9.22.1.1, < 9.22.2.4 |
| Cisco | Adaptive Security Appliance Software | >= 9.23.1, < 9.23.1.7 |
| Cisco | Secure Firewall Threat Defense | >= 6.4.0, < 7.0.9 |
| Cisco | Secure Firewall Threat Defense | >= 7.1.0, < 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
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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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