CVE-2026-20101
High
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.
SeverityHigh
CVSS8.6
Exploit probability—
Product
Cisco Secure Firewall Threat Defense
PublishedMar 4, 2026
First seenMar 4, 2026
Weakness typeCWE-330CWE-330
How to fix
Update
- cisco secure_firewall_threat_defense7.0.9, 7.2.11, 7.4.3, 7.6.4, 7.7.11 or later
- cisco adaptive_security_appliance_software9.16.4.85, 9.18.4.66, 9.20.4, 9.22.2.4, 9.23.1.7 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| cisco secure_firewall_threat_defense | 6.4.0 ≤ v < 7.0.9, 7.1.0 ≤ v < 7.2.11, 7.3.0 ≤ v < 7.4.3, 7.6.0 ≤ v < 7.6.4, 7.7.0 ≤ v < 7.7.11 | 7.0.9, 7.2.11, 7.4.3, 7.6.4, 7.7.11 |
| cisco adaptive_security_appliance_software | 9.12.1 ≤ v < 9.16.4.85, 9.17.1 ≤ v < 9.18.4.66, 9.19.1 ≤ v < 9.20.4, 9.22.1.1 ≤ v < 9.22.2.4, 9.23.1 ≤ v < 9.23.1.7 | 9.16.4.85, 9.18.4.66, 9.20.4, 9.22.2.4, 9.23.1.7 |
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