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Findings

CVE-2026-20079

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

Published Mar 4, 2026 · updated Sep 16, 2026 · Cisco Secure Firewall Management Center (FMC) and Security Cloud Control (SCC) Firewall Management

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.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 4, 2026 · Catalog

    Detected

    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 vulnerabil

  2. Sep 9, 2026 · CISA KEV

    Known exploited

    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

  3. Sep 12, 2026 · CISA KEV

    Remediation due

    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

  4. Sep 16, 2026 · Catalog

    Updated

    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 vulnerabil

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.

CISA due date Sep 12, 2026

Affected

  • cpe cisco/secure firewall management center7.0.0
  • cpe cisco/secure firewall management center7.0.0.1
  • cpe cisco/secure firewall management center7.0.1
  • cpe cisco/secure firewall management center7.0.1.1
  • cpe cisco/secure firewall management center7.0.2
  • cpe cisco/secure firewall management center7.0.2.1
  • cpe cisco/secure firewall management center7.0.3
  • cpe cisco/secure firewall management center7.0.4
  • vendor Cisco Secure Firewall Management Center (FMC) and Security Cloud Control (SCC) Firewall Managementversion unspecified

Sources

  • CISA KEVCVE-2026-20079

    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.

    cisa.gov
  • CVE.orgCVE-2026-20079

    Official CVE identifier

    cve.org
  • FIRST EPSSCVE-2026-20079

    30-day exploitation probability 88.2%

    first.org
  • Metasploit Modulesexploit_linux/http/cisco_fmc_auth_bypass_rce

    Public module reference (normal). Module source is not copied into this catalog.

    rapid7.com
  • NIST NVDCVE-2026-20079

    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.

    nvd.nist.gov

References