Cisco warns of max severity Secure FMC flaws giving root access

Cisco warns of max severity Secure FMC flaws giving root access

By Sergiu Gatlan
Publication Date: 2026-03-04 19:12:00

Cisco has released security updates to patch two maximum-severity vulnerabilities in its Secure Firewall Management Center (FMC) software.

Secure FMC is a web or SSH-based interface for admins to manage Cisco firewalls and configure application control, intrusion prevention, URL filtering, and advanced malware protection.

Both vulnerabilities can be exploited remotely by unauthenticated attackers: the authentication bypass flaw (CVE-2026-20079) allows attackers to gain root access to the underlying operating system, while the remote code execution (RCE) vulnerability (CVE-2026-20131) lets them execute arbitrary Java code as root on unpatched devices.

“An attacker could exploit this vulnerability by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to execute a variety of scripts and commands that allow root access to the device,” the CVE-2026-20079 advisory reads.

“An attacker could exploit this vulnerability by sending a…