CVE-2026-20079
Cisco Secure Firewall Management Center Authentication Bypass Remote Code Execution Vulnerability
Severity
Critical 10
CVSS 3.1
Exploited
Yes — in CISA KEV
Added Sep 9, 2026
EPSS
0.758
99.5th percentile
Discovered by
Third party
Vendor-published field
Published
Mar 4, 2026
Assigned by cisco
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.
Weakness: CWE-288
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Cisco | Cisco Secure Firewall | Firewall / NGFW | cna-assigner |
Vendor-reported products (1)
- Cisco · Cisco Secure Firewall Management Center (FMC)