CVE-2020-3580: Cisco ASA and FTD Cross-Site Scripting (XSS) Vulnerability

Cisco ASA and FTD contain an insufficient input validation vulnerability in their web services interface that enables cross-site scripting (XSS). Successful exploitation allows attackers to execute arbitrary scripts within the context of the interface or access sensitive browser-based information. The vulnerability is identified as CVE-2020-3580 and is associated with CWE-79. Exploits have been observed in the wild, including use in ransomware campaigns.

Exploitation of this vulnerability can lead to execution of malicious scripts in the context of the ASA or FTD web interface, potentially exposing sensitive browser information or enabling further attacks via the compromised interface. This can undermine the security of the affected network devices and facilitate ransomware or other malicious activities.

No explicit patch or remediation details are provided in the input data. Patch status is not yet confirmed — check the Cisco vendor advisory for current remediation guidance. Until a fix is applied, limit access to the web services interface to trusted users and networks to reduce exposure.