Cross-site scripting in Cisco Firewall Threat Defense (FTD) and Cisco Adaptive Security Appliance (ASA) - CVE-2026-20102
Published: March 9, 2026
Vulnerability identifier: #VU123656
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2026-20102
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data within the SAML feature. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
Affected software
Cisco Firewall Threat Defense (FTD)
Cisco Adaptive Security Appliance (ASA)
Cisco Adaptive Security Appliance (ASA)
How to mitigate CVE-2026-20102
Install updates from vendor's website.
Cisco Firewall Threat Defense (FTD) - addressed in versions 7.0.9, 7.2.11, 7.4.3
Cisco Adaptive Security Appliance (ASA) - addressed in versions 9.16.4.89, 9.18.4.71, 9.20.4.19, 9.22.2.32, 9.23.1.26, 9.24.1
Cisco Adaptive Security Appliance (ASA) - addressed in versions 9.16.4.89, 9.18.4.71, 9.20.4.19, 9.22.2.32, 9.23.1.26, 9.24.1