CVE-2026-20079: Cisco Secure Firewall Management Center Authentication Bypass Remote Code Execution Vulnerability
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.
Other sources
Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management contain an authentication Bypass using an alternate path or channel vulnerability that 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.
— CISA
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-20079?
CVE-2026-20079 has been classified as a high-severity vulnerability due to its potential to allow unauthenticated remote attackers to gain root access.
How do I fix CVE-2026-20079?
To fix CVE-2026-20079, update to the latest version of Cisco Secure Firewall Management Center Software which addresses this vulnerability.
Who is affected by CVE-2026-20079?
CVE-2026-20079 affects users running Cisco Secure Firewall Management Center Software without the latest security updates.
What type of attack is associated with CVE-2026-20079?
The attack associated with CVE-2026-20079 involves bypassing authentication and executing script files to obtain unauthorized root access.
Is there a known exploit for CVE-2026-20079?
Yes, CVE-2026-20079 may be actively exploited, making it crucial for affected users to apply security patches immediately.