CVE-2026-20079CiscoFirewall and VPNSeptember 9, 2026

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

Critical 10Actively exploited

Description

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.

What to do

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.

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Details

Vendor
Cisco
Product
Cisco Secure Firewall Management Center
CVE
CVE-2026-20079
Affected versions
Cisco Secure Firewall Management Center (FMC) 7.0: 17 versions, from 7.0.0 to 7.0.9
Cisco Secure Firewall Management Center (FMC) 7.1: 4 versions, from 7.1.0 to 7.1.0.3
Cisco Secure Firewall Management Center (FMC) 7.2: 20 versions, from 7.2.0 to 7.2.11
Cisco Secure Firewall Management Center (FMC) 7.3: 4 versions, from 7.3.0 to 7.3.1.2
Cisco Secure Firewall Management Center (FMC) 7.4: 13 versions, from 7.4.0 to 7.4.7
Cisco Secure Firewall Management Center (FMC) 7.6: 7 versions, from 7.6.0 to 7.6.5
Cisco Secure Firewall Management Center (FMC) 7.7: 5 versions, from 7.7.0 to 7.7.12
Cisco Secure Firewall Management Center (FMC) 10.0: 10.0.0; 10.0.1 (from the advisory and NVD; check the exact builds in the official advisory)
CVSS score
10
Actively exploited
Yes, listed in the CISA Known Exploited Vulnerabilities catalog
CISA due date
September 12, 2026 (deadline for US federal agencies: a good benchmark for you too)
Source
CISA KEV – original advisory
Published
September 9, 2026

The description and the recommended action are quoted from the public advisory; severity, exploitation status and affected versions are compiled automatically from public sources and may contain errors. The vendor's original advisory prevails: check it before taking action. This information is provided without warranty and does not replace a professional assessment.

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