CVE-2026-20079NVD

Vulnerability 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 Level

CRITICAL(10.0)

Published Date

Mar 4, 2026

Last Modified

Sep 10, 2026

PoC

Available(Metasploit, Nuclei)

Exploitation Status

ACTIVE

EPSS Score (30-Day)

88.18%Probability

Root Weakness (CWE)

CWE-288: Unknown/Unlisted Weakness ↗

Refer to the official MITRE database for detailed architectural specifications regarding this weakness.

CVSS v3.1 Base Metrics — Score 10.0 (CRITICAL)

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeChanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

Affected & Patched Versions

Affected Versions

Cisco Secure Firewall Management Center

Patched Versions

Not provided by NVD for this CVE.

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