CVE-2026-20079

A vulnerability in the web interface of Cisco Secure Firewall Management Center (FMC) Software could allow an unauthenticated, remote attacker to bypass authentication and execute script files on an affected device to obtain root access to the underlying operating system.  This vulnerability is due to an improper system process that is created at boot time. 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. 

Affected products

Cisco Secure Firewall Management Center (Fmc)

CVSS 3.1

10.0 CRITICAL

EPSS

37.7% (98th percentile)

Weakness

CWE-288

NVD status

Awaiting Analysis

Published

2026-03-04