CVE-2020-3320: Cisco Secure Firewall Management Center

Medium severity, CVSS 5.4. EPSS: 0.6% chance of exploitation in the next 30 days.

A vulnerability in the web-based management interface of Cisco Firepower Management Center could allow an authenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the web-based management interface of an affected device. The vulnerability is due to insufficient validation of user-supplied input by the web-based management interface of an affected device. An attacker could exploit this vulnerability by first entering input within the web-based management interface and then persuading a user of the interface to view the crafted input within the interface. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information.

Affected products

• Cisco Secure Firewall Management Center: up to and including 6.6.1
• Cisco Sourcefire Defense Center: version 6.4.0 only; version 6.4.0.6 only; version 6.5.0 only; version 6.6.0 only

Published 2020-10-08. Last modified 2026-06-17.