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Vulnerabilities CVE-2026-20079

CVE-2026-20079

Critical
Open
TLP:CLEAR

Cisco Secure Firewall Management Center Authentication Bypass Remote Code Execution Vulnerability

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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. 

Details

CVSS Score
10.0
EPSS Score
37.67%

98.4th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Confidence
90%
Published
Mar 4, 2026
Last Modified
Aug 5, 2026
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