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CVE-2026-20079

Published: Mar 4, 2026Updated: Mar 5, 2026 Sources: CVE List NVD BDUCWE-288
NVD MITRE
10.0CVSSCRITICAL
EPSS Score
33.9%
Top 1.8%
CISA KEV
Not in KEV
Exploits
0 Known
Remediation
Patch Available
Am I actually vulnerable?1 Nuclei template available — see how to check your systems. How to verify

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:CC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-288

Affected Products

Cisco Secure Firewall Management CenterCisco Systems Inc.Networking Infrastructure
Cisco Secure Firewall Management Center (FMC)CiscoNetworking Infrastructure
cisco systems inc.commercialUSNetworking Infrastructureaka cisco systems, cisco
ciscocommercialUSNetworking Infrastructureaka cisco systems, cisco systems inc.

Exploitability

0 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-onprem-fmc-authbypass-5JPp45V2
sec.cloudapps.cisco.com
https://github.com/0xBlackash/CVE-2026-20079
github.com

Timeline

Published
Mar 4, 2026
Last Updated
Mar 5, 2026

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