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CVE-2026-20101

Severity CVSS v4.0:
Pending analysis
Type:
CWE-330 Use of Insufficiently Random Value
Publication date:
04/03/2026
Last modified:
16/04/2026

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.<br /> <br /> 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.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 8.60 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
8.60
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* 9.12.1 (including) 9.16.4.85 (excluding)
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* 9.17.1 (including) 9.18.4.66 (excluding)
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* 9.19.1 (including) 9.20.4 (excluding)
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* 9.22.1.1 (including) 9.22.2.4 (excluding)
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* 9.23.1 (including) 9.23.1.7 (excluding)
cpe:2.3:a:cisco:firepower_threat_defense_software:*:*:*:*:*:*:*:* 6.4.0 (including) 7.0.9 (excluding)
cpe:2.3:a:cisco:firepower_threat_defense_software:*:*:*:*:*:*:*:* 7.1.0 (including) 7.2.11 (excluding)
cpe:2.3:a:cisco:firepower_threat_defense_software:*:*:*:*:*:*:*:* 7.3.0 (including) 7.4.3 (excluding)
cpe:2.3:a:cisco:firepower_threat_defense_software:*:*:*:*:*:*:*:* 7.6.0 (including) 7.6.4 (excluding)
cpe:2.3:a:cisco:firepower_threat_defense_software:*:*:*:*:*:*:*:* 7.7.0 (including) 7.7.11 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools