Is It On KEV?

Cisco Secure Firewall Management Center (FMC) and Security Cloud Control (SCC) Firewall Management

YES - ON THE CISA KEV LIST
CVE-2026-20079

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

CISA catalog due date2026-09-12
60 days past due
EPSS exploit probability (next 30 days)88.7% · 100percentile
From CVE publication to KEV listing189 days (2026-03-04 → 2026-09-09)
Remediation window (KEV listing to due date)3 days
Days on the KEV list63 days
Date added to KEV2026-09-09
Known ransomware campaign useUnknown
VendorCisco
ProductSecure Firewall Management Center (FMC) and Security Cloud Control (SCC) Firewall Management
Weaknesses (CWE)CWE-288

Cisco: 103 entries (5.8% of all KEV entries are from this vendor); 21 added in 2026.

BOD 26-04 note: this is the date printed in the CISA catalog. A federal agency's actual deadline is set by its SSVC tier - Act (3 days), Attend (14 days), Track (60 days), or the next scheduled upgrade - counted from the KEV listing date or the date the vulnerability is identified in its environment, whichever comes first. Use the tier helper on each CVE page for your own window.

Your BOD 26-04 window (SSVC tier helper)

Your remediation window ends:

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.

Required action (CISA)

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

References

Other KEV entries for this vendor: Cisco

Cisco - Vendors with KEV entries

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