CVE-2026-20101
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.
- Score
- CVSS 3.1 8.6 High
- Status
- Analyzed - psirt@cisco.com
- Published
- 2026-03-04
- Last modified
- 2026-03-05
- Weaknesses
- CWE-330
Affected products
- Adaptive Security Appliance Software (Cisco)
- Cisco Secure Firewall Adaptive Security Appliance Asa Software (Cisco)
- Cisco Secure Firewall Threat Defense Ftd Software (Cisco)
- Secure Firewall Threat Defense (Cisco)
References
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-vpn-m9sx6MbC
