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CVE-2026-20101

nvd nist
Published: Mar 4, 2026Modified: Jun 17, 2026

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8.6
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Exploitability: 3.9 / Impact: 4.0
Source: psirt@cisco.com (Secondary)

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.

Affected (10)

Cisco
2 products
Adaptive Security Appliance Software
Firepower Threat Defense Software
Configuration A
5 vulnerable
Vulnerable SoftwareAffected Versions
Cisco
Adaptive Security Appliance Software
From 9.12.1 to 9.16.4.85
Adaptive Security Appliance Software
From 9.17.1 to 9.18.4.66
Adaptive Security Appliance Software
From 9.19.1 to 9.20.4
Adaptive Security Appliance Software
From 9.22.1.1 to 9.22.2.4
Adaptive Security Appliance Software
From 9.23.1 to 9.23.1.7
Configuration B
5 vulnerable
Vulnerable SoftwareAffected Versions
Cisco
Firepower Threat Defense Software
From 6.4.0 to 7.0.9
Firepower Threat Defense Software
From 7.1.0 to 7.2.11
Firepower Threat Defense Software
From 7.3.0 to 7.4.3
Firepower Threat Defense Software
From 7.6.0 to 7.6.4
Firepower Threat Defense Software
From 7.7.0 to 7.7.11

Related CWEs

CWE-330
Use of Insufficiently Random Values
The product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers.

References (1)

Source: psirt@cisco.com
Vendor Advisory

Timeline

No history available yet.