VULNERABILITY INTELLIGENCE

CVE-2026-20079

CVSS score10 CRITICAL

EPSS probability88.66%

CISA KEVKnown exploited vulnerability

Published2026-03-04

Last modified2026-09-16

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

Known Exploited Vulnerability

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

Vendor / product: Cisco / Secure Firewall Management Center (FMC) and Security Cloud Control (SCC) Firewall Management

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 classification

psirt@cisco.com: CWE-288

Primary references

psirt@cisco.com — Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Mailing List, Third Party Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0 — Exploit, Third Party Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0 — US Government Resource