Cisco FMC: Auth Bypass & Remote Code Execution via Web Interface
CVE-2026-20079 Published on March 4, 2026
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.
Vulnerability Analysis
CVE-2026-20079 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Weakness Type
Authentication Bypass Using an Alternate Path or Channel
A product requires authentication, but the product has an alternate path or channel that does not require authentication.
Products Associated with CVE-2026-20079
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Affected Versions
Cisco Secure Firewall Management Center (FMC):- Version 7.0.0 is affected.
- Version 7.0.0.1 is affected.
- Version 7.0.1 is affected.
- Version 7.0.1.1 is affected.
- Version 7.0.2 is affected.
- Version 7.0.2.1 is affected.
- Version 7.0.3 is affected.
- Version 7.0.4 is affected.
- Version 7.0.5 is affected.
- Version 7.0.6 is affected.
- Version 7.0.6.1 is affected.
- Version 7.0.6.2 is affected.
- Version 7.0.6.3 is affected.
- Version 7.0.7 is affected.
- Version 7.0.8 is affected.
- Version 7.0.8.1 is affected.
- Version 7.1.0 is affected.
- Version 7.1.0.1 is affected.
- Version 7.1.0.2 is affected.
- Version 7.1.0.3 is affected.
- Version 7.2.0 is affected.
- Version 7.2.1 is affected.
- Version 7.2.2 is affected.
- Version 7.2.0.1 is affected.
- Version 7.2.3 is affected.
- Version 7.2.3.1 is affected.
- Version 7.2.4 is affected.
- Version 7.2.4.1 is affected.
- Version 7.2.5 is affected.
- Version 7.2.5.1 is affected.
- Version 7.2.6 is affected.
- Version 7.2.7 is affected.
- Version 7.2.5.2 is affected.
- Version 7.2.8 is affected.
- Version 7.2.8.1 is affected.
- Version 7.2.9 is affected.
- Version 7.2.10 is affected.
- Version 7.2.10.2 is affected.
- Version 7.2.10.1 is affected.
- Version 7.3.0 is affected.
- Version 7.3.1 is affected.
- Version 7.3.1.1 is affected.
- Version 7.3.1.2 is affected.
- Version 7.4.0 is affected.
- Version 7.4.1 is affected.
- Version 7.4.1.1 is affected.
- Version 7.4.2 is affected.
- Version 7.4.2.1 is affected.
- Version 7.4.2.2 is affected.
- Version 7.4.2.3 is affected.
- Version 7.4.2.4 is affected.
- Version 7.4.3 is affected.
- Version 7.6.0 is affected.
- Version 7.6.1 is affected.
- Version 7.6.2 is affected.
- Version 7.6.2.1 is affected.
- Version 7.6.3 is affected.
- Version 7.7.0 is affected.
- Version 7.7.10 is affected.
- Version 7.7.10.1 is affected.
- Version 7.7.11 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.