CVE-2020-3515: Cisco Secure Firewall Management Center

Medium severity, CVSS 6.1. EPSS: 0.8% chance of exploitation in the next 30 days.

Multiple vulnerabilities in the web-based management interface of Cisco Firepower Management Center (FMC) Software could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the interface. These vulnerabilities are due to insufficient validation of user-supplied input by the web-based management interface. An attacker could exploit these vulnerabilities by persuading a user of the interface to click a crafted link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the interface or access sensitive, browser-based information.

Affected products

• Cisco Secure Firewall Management Center: before 6.6.1 (fixed in 6.6.1)

Published 2020-10-21. Last modified 2026-06-17.