CVE-2026-20101: High severity Cisco Secure Firewall ASA Software vulnerability
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.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-20101?
CVE-2026-20101 has been classified as a critical severity vulnerability due to its potential to cause a denial of service (DoS).
How does CVE-2026-20101 impact affected Cisco products?
CVE-2026-20101 allows an unauthenticated remote attacker to cause affected devices to reload unexpectedly, leading to service disruptions.
What versions are affected by CVE-2026-20101?
CVE-2026-20101 affects Cisco Secure Firewall ASA Software and Cisco Secure FTD Software without specifying particular versions.
How can I mitigate CVE-2026-20101?
To mitigate CVE-2026-20101, update your Cisco Secure Firewall ASA Software or Secure FTD Software to the latest version that addresses this vulnerability.
Is there a workaround for CVE-2026-20101?
There are no specific workarounds provided for CVE-2026-20101, and the best solution is to apply the recommended updates.