CRITICAL CISA KEV

CVE-2026-20079

CVSS v3

CRITICAL

EPSS Score

88.2 %

exploit probability, as of 2026-10-05

CISA KEV

Yes

known exploited

Exploitation

—

SSVC status

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

CISA Known Exploited Vulnerability

Date Added: 2026-09-09
Patch Due Date: 2026-09-12
Ransomware Use: Unknown

Technical details

Published: 2026-03-04
Last Modified: 2026-03-05

Frequently asked questions

What is CVE-2026-20079?

Is CVE-2026-20079 actively exploited?

Yes. CVE-2026-20079 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2026-09-12.

What is the CVSS score for CVE-2026-20079?

CVE-2026-20079 has a CVSS v3 base score of 10 (CRITICAL severity).

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