CVEvulnerability

CVE-2026-20079

10.0 CRITICAL Known exploited Published 2026-03-04 Modified 2026-09-16 Official page ↗

CISA Known Exploited Vulnerability

Cisco Firewall Management Center Authentication Bypass Using an Alternate Path or Channel Vulnerability — Cisco Secure Firewall Management Center (FMC) and Security Cloud Control (SCC) Firewall Management

Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management contain an authentication Bypass using an alternate path or channel vulnerability that 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.

Added to KEV
2026-09-09
Remediation due
2026-09-12
Ransomware use
Unknown
Required action
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.
Notes
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-onprem-fmc-authbypass-5JPp45V2 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-20079
Status
Analyzed
Published
2026-03-04
Last modified
2026-09-16
Assigner
[email protected]
CVSS 3.1 ([email protected])
10.0 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Weaknesses
CWE-288

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. 

Affected configurations

• 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 • 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 • cisco secure firewall management center 7.2.11 • cisco secure firewall management center 7.3.0 • cisco secure firewall management center 7.3.1 • cisco secure firewall management center 7.3.1.1 • cisco secure firewall management center 7.3.1.2 • cisco secure firewall management center 7.4.0 • cisco secure firewall management center 7.4.1 • cisco secure firewall management center 7.4.1.1 • cisco secure firewall management center 7.4.2 • cisco secure firewall management center 7.4.2.1 • cisco secure firewall management center 7.4.2.2 • cisco secure firewall management center 7.4.2.3 • cisco secure firewall management center 7.4.2.4 • cisco secure firewall management center 7.4.3 • cisco secure firewall management center 7.4.4 • cisco secure firewall management center 7.4.5 • cisco secure firewall management center 7.4.6 • cisco secure firewall management center 7.4.7 • cisco secure firewall management center 7.6.0 • cisco secure firewall management center 7.6.1 … and 12 more

Related

Weakness · CWE (1)

  • CWE-288 Authentication Bypass Using an Alternate Path or Channel weakness

References