CVE-2026-20079 | Secure Firewall Management Center (FMC) Software Operational Intel

Executive Risk 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 and can be exploited by sending crafted HTTP requests to an affected device."

Operational Audit Arsenal

Target Type Firmware

Target Asset Cisco Secure Firewall Management Center (FMC) Software

Standard Path Firmware Image

Manual Verification Required

This is a non-Windows asset (Cisco). Use the target asset details and official path provided above to verify your current version against the official vendor advisories listed below.

Patch Impact Forecast

Reboot Required Likely

Potential network disruption during reboot

Internal Work Notes

CVE-2026-20079: Unauthenticated remote attacker can bypass authentication and gain root access to Cisco FMC, exploit via crafted HTTP requests, patch and reboot required

Technical Intelligence & Operational Utilities • Delivered Weekly

Intelligence Sources

Official Advisoryhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-onprem-fmc-authbypass-5JPp45V2

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Cisco ISE - API

Data compiled from NVD, MSRC, and CISA KEV Catalog. Intelligence synthesized via AI. Scripts provided for diagnostic purposes under MIT License.