CVE-2026-20079
Description
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.
Summary dbcve.org
An authentication bypass vulnerability in Cisco Secure Firewall Management Center (FMC) web interface allows unauthenticated remote attackers to execute scripts and obtain root OS access. The root cause is an improper system process created at boot time that can be exploited via crafted HTTP requests.
Mitigation
Apply the vendor patch/update from Cisco for FMC Software to remediate the improper system process and authentication bypass. Since this is a critical infrastructure device, updates should be tested in a staging environment before production deployment.