CVE-2026-20079

10.0

CRITICAL CVSS 3.1

"Cisco Secure Firewall Management Center FMC Unauthorized Script Execution"

Overview

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.

Details

INFO

Published Date :

March 4, 2026, 6:16 p.m.

Last Modified :

March 5, 2026, 7:39 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]

Impact

Affected Products

The following products are affected by CVE-2026-20079 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

No affected product recoded yet

: Total Affected Vendor : 0 | Products : 0

Scoring

CVSS Scores

The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.

Score	Version	Severity	Vector	Exploitability Score	Impact Score	Source
	CVSS 3.1	CRITICAL				[email protected]
	CVSS 3.1	CRITICAL				MITRE-CVE

Solution

Update Cisco Secure Firewall Management Center Software to a fixed version.

Update Cisco Secure Firewall Management Center Software to a fixed version.
Apply vendor-provided patches or updates immediately.
Monitor systems for any signs of compromise.

Public PoC/Exploit Available at Github

CVE-2026-20079 has a 4 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

References

References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-20079.

URL	Resource
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-onprem-fmc-authbypass-5JPp45V2

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-20079 is associated with the following CWEs:

CWE-288: Authentication Bypass Using an Alternate Path or Channel

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-20079 weaknesses.

CAPEC-127: Directory Indexing Directory Indexing CAPEC-665: Exploitation of Thunderbolt Protection Flaws Exploitation of Thunderbolt Protection Flaws

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

kali1129/ai-pentest-proxy

AI Pentest Proxy es una herramienta profesional de seguridad ofensiva que combina la potencia de múltiples modelos de inteligencia artificial con técnicas avanzadas de pentesting para identificar, confirmar y explotar vulnerabilidades web de forma autónoma.

pentesting pentesting-tools ia-to

Python Shell JavaScript HTML CSS Dockerfile

Updated: 6 days, 4 hours ago

1 stars 0 fork 0 watcher

Born at : March 6, 2026, 2:22 p.m. This repo has been linked 9 different CVEs too.

Sushilsin/CVE-2026-20079

CVE-2026-20079 — Cisco FMC Authentication Bypass

Python

Updated: 2 weeks, 3 days ago

1 stars 0 fork 0 watcher

Born at : March 6, 2026, 5:32 a.m. This repo has been linked 1 different CVEs too.

b1gchoi/CVE-2026-20079

Cisco FMC Authentication Bypass PoC

Updated: 2 weeks, 1 day ago

0 stars 0 fork 0 watcher

Born at : March 5, 2026, 4:12 p.m. This repo has been linked 1 different CVEs too.

nomi-sec/PoC-in-GitHub

📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.

security cve exploit poc vulnerability

Updated: 3 days, 1 hour ago

7589 stars 1242 fork 1242 watcher

Born at : Dec. 8, 2019, 1:03 p.m. This repo has been linked 778 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-20079 vulnerability anywhere in the article.

security.nl

Cisco-lek sinds januari gebruikt bij ransomware-aanvallen, patch kwam in maart

Een kritieke kwetsbaarheid in het Cisco Secure Firewall Management Center (FMC) is sinds januari gebruikt bij ransomware-aanvallen, aldus Amazon. Cisco kwam op 4 maart met een beveiligingsupdate voor ...

Published Date: Mar 19, 2026 (5 days, 15 hours ago)

Hackread - Cybersecurity News, Data Breaches, AI and More

Cisco Patches 48 Firewall Vulnerabilities with Two CVSS 10 Flaws

Cisco has issued security updates addressing dozens of vulnerabilities affecting several of its firewall platforms, including Cisco Secure Firewall Adaptive Security Appliance, Cisco Secure Firewall M ...

Published Date: Mar 06, 2026 (2 weeks, 4 days ago)

The Hacker News

Cisco Confirms Active Exploitation of Two Catalyst SD-WAN Manager Vulnerabilities

Cisco has disclosed that two more vulnerabilities affecting Catalyst SD-WAN Manager (formerly SD-WAN vManage) have come under active exploitation in the wild. The vulnerabilities in question are liste ...