CVE-2021-1457: Cisco Secure Firewall Management Center

Medium severity, CVSS 4.8. EPSS: 0.6% 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: up to and including 6.4.0.11; from 6.5.0, before 6.6.3 (fixed in 6.6.3); from 6.7.0, before 6.7.0.2 (fixed in 6.7.0.2)

Published 2021-04-29. Last modified 2026-06-17.