Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-20079

CVE-2026-20079CRITICAL

Cisco Secure Firewall Management Center Authentication Bypass Remote Code Execution Vulnerability

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  C  H  H  H   10.0   .8818   99.8   YES

AFFECTED
  Product                                        Versions  Fixed
  Cisco Secure Firewall Management Center (FMC)  7.0.0 –   —

TIMELINE
  Oct 8   Reserved by cisco
  Mar 4   Published (CNA: cisco)
  Sep 9   ADDED TO KEV — CVE-2026-20079 (Cisco Secure Firewall Management Center (FMC)). Remediation due September 12, 2026.
  Sep 10  EXPLOIT PUBLISHED — CVE-2026-20079 (Cisco Secure Firewall Management Center (FMC)). Public exploit reference added.
  Sep 13  DUE DATE PASSED — CVE-2026-20079 (Cisco Secure Firewall Management Center (FMC)). CISA remediation deadline was September 12, 2026; still in catalog.
  Sep 16  EXPLOIT PUBLISHED — CVE-2026-20079 (Cisco Secure Firewall Management Center (FMC)). Public exploit reference added.

CWE-288 · CNA: cisco · CVSS v3.1 · 4 references · NVD status: Analyzed · KEV due September 12, 2026

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. 

Lifecycle

Complete event history — 6 events, chronological
Date	Event	Detail
October 8, 2025	Reserved	Reserved by cisco
March 4, 2026	Published	Published (CNA: cisco)
September 9, 2026	KEV ADDED	ADDED TO KEV — CVE-2026-20079 (Cisco Secure Firewall Management Center (FMC)). Remediation due September 12, 2026.
September 10, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-20079 (Cisco Secure Firewall Management Center (FMC)). Public exploit reference added.
September 13, 2026	DUE DATE PASSED	DUE DATE PASSED — CVE-2026-20079 (Cisco Secure Firewall Management Center (FMC)). CISA remediation deadline was September 12, 2026; still in catalog.
September 16, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-20079 (Cisco Secure Firewall Management Center (FMC)). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Cisco	Cisco Secure Firewall Management Center (FMC)	—	7.0.0	—

Weaknesses

CWE-288

References (4)

http://seclists.org/fulldisclosure/2026/Aug/80 [Exploit, Mailing List, Third Party Advisory]
https://blog.talosintelligence.com/fmc-ongoing-exploitation/ [Exploit, Third Party Advisory]
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-onprem-fmc-authbypass-5JPp45V2 [Vendor Advisory]
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20079 [US Government Resource]

Authoritative record: CVE-2026-20079 at cve.org

Vendors: cisco

Weaknesses: CWE-288

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-20079 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.