CVE-2026-20079

Critical

Cisco Firewall Management Center Authentication Bypass Using an Alternate Path or Channel Vulnerability

10.0 CVSS v3.1

Published: Mar 4, 2026
Updated: Sep 16, 2026
Vendor: Cisco
Affected versions: See affected products
Weakness: CWE-288

Summary

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.

Severity

Critical (10.0)

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

Cisco Secure Firewall Management Center 7.0.0
Cisco Secure Firewall Management Center 7.0.0.1
Cisco Secure Firewall Management Center 7.0.1
Cisco Secure Firewall Management Center 7.0.1.1
Cisco Secure Firewall Management Center 7.0.2
Cisco Secure Firewall Management Center 7.0.2.1
Cisco Secure Firewall Management Center 7.0.3
Cisco Secure Firewall Management Center 7.0.4
Cisco Secure Firewall Management Center 7.0.5
Cisco Secure Firewall Management Center 7.0.6
Cisco Secure Firewall Management Center 7.0.6.1
Cisco Secure Firewall Management Center 7.0.6.2

Show 28 more

Cisco Secure Firewall Management Center 7.0.6.3
Cisco Secure Firewall Management Center 7.0.7
Cisco Secure Firewall Management Center 7.0.8
Cisco Secure Firewall Management Center 7.0.8.1
Cisco Secure Firewall Management Center 7.0.9
Cisco Secure Firewall Management Center 7.1.0
Cisco Secure Firewall Management Center 7.1.0.1
Cisco Secure Firewall Management Center 7.1.0.2
Cisco Secure Firewall Management Center 7.1.0.3
Cisco Secure Firewall Management Center 7.2.0
Cisco Secure Firewall Management Center 7.2.0.1
Cisco Secure Firewall Management Center 7.2.1
Cisco Secure Firewall Management Center 7.2.2
Cisco Secure Firewall Management Center 7.2.3
Cisco Secure Firewall Management Center 7.2.3.1
Cisco Secure Firewall Management Center 7.2.4
Cisco Secure Firewall Management Center 7.2.4.1
Cisco Secure Firewall Management Center 7.2.5
Cisco Secure Firewall Management Center 7.2.5.1
Cisco Secure Firewall Management Center 7.2.5.2
Cisco Secure Firewall Management Center 7.2.6
Cisco Secure Firewall Management Center 7.2.7
Cisco Secure Firewall Management Center 7.2.8
Cisco Secure Firewall Management Center 7.2.8.1
Cisco Secure Firewall Management Center 7.2.9
Cisco Secure Firewall Management Center 7.2.10
Cisco Secure Firewall Management Center 7.2.10.1
Cisco Secure Firewall Management Center 7.2.10.2

Exploitation status

Actively exploited

Listed in the CISA Known Exploited Vulnerabilities catalog on Sep 9, 2026. Federal remediation due: Sep 12, 2026.

Technical details

Technical analysis has not been written for this record yet.

Mitigation & remediation

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.