CVE-2019-16028: Cisco Secure Firewall Management Center

Critical severity, CVSS 9.8. EPSS: 3.4% chance of exploitation in the next 30 days.

A vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC) could allow an unauthenticated, remote attacker to bypass authentication and execute arbitrary actions with administrative privileges on an affected device. The vulnerability is due to improper handling of Lightweight Directory Access Protocol (LDAP) authentication responses from an external authentication server. An attacker could exploit this vulnerability by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to gain administrative access to the web-based management interface of the affected device.

Affected products

• Cisco Secure Firewall Management Center: before 6.2.3.16 (fixed in 6.2.3.16); from 6.3.0, before 6.3.0.6 (fixed in 6.3.0.6); from 6.4.0, before 6.4.0.7 (fixed in 6.4.0.7); from 6.5.0, before 6.5.0.2 (fixed in 6.5.0.2)

Published 2020-09-23. Last modified 2026-06-17.