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CVE-2026-20102

Severity CVSS v4.0:
Pending analysis
Type:
CWE-79 Cross-Site Scripting (XSS)
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 Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against the SAML feature and access sensitive, browser-based information.<br /> <br /> This vulnerability is due to insufficient input validation of multiple HTTP parameters. An attacker could exploit this vulnerability by persuading a user to access a malicious link. A successful exploit could allow the attacker&amp;nbsp;to conduct a reflected XSS attack through an affected device.

Impact

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

Base Score: 6.10 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

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

Base Score 3.x
6.10
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* 9.16.1 (including) 9.16.4.89 (excluding)
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* 9.17.1 (including) 9.18.4.71 (excluding)
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* 9.20.1 (including) 9.20.4.19 (excluding)
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* 9.22.1.1 (including) 9.22.2.32 (excluding)
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* 9.23.1 (including) 9.23.1.26 (excluding)
cpe:2.3:a:cisco:firepower_threat_defense_software:*:*:*:*:*:*:*:* 7.0.0 (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:*:*:*:*:*:*:*:* 7.4.0 (including) 7.4.3 (excluding)
cpe:2.3:a:cisco:firepower_threat_defense_software:*:*:*:*:*:*:*:* 7.6.0 (including) 10.0.0 (excluding)

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


References to Advisories, Solutions, and Tools