CVE-2026-20079

CRITICAL10.0Auth bypass

CISA KEVPublic PoCNewsHigh EPSS

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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 breakdown

CVSS 3.1

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Affected products

Cisco / Cisco Secure Firewall Management Center (FMC)7.0.0 – 7.0.0
Cisco / Cisco Secure Firewall Management Center (FMC)7.0.0.1 – 7.0.0.1
Cisco / Cisco Secure Firewall Management Center (FMC)7.0.1 – 7.0.1
Cisco / Cisco Secure Firewall Management Center (FMC)7.0.1.1 – 7.0.1.1
Cisco / Cisco Secure Firewall Management Center (FMC)7.0.2 – 7.0.2
Cisco / Cisco Secure Firewall Management Center (FMC)7.0.2.1 – 7.0.2.1
Cisco / Cisco Secure Firewall Management Center (FMC)7.0.3 – 7.0.3
Cisco / Cisco Secure Firewall Management Center (FMC)7.0.4 – 7.0.4
Cisco / Cisco Secure Firewall Management Center (FMC)7.0.5 – 7.0.5
Cisco / Cisco Secure Firewall Management Center (FMC)7.0.6 – 7.0.6
Cisco / Cisco Secure Firewall Management Center (FMC)7.0.6.1 – 7.0.6.1
Cisco / Cisco Secure Firewall Management Center (FMC)7.0.6.2 – 7.0.6.2
Cisco / Cisco Secure Firewall Management Center (FMC)7.0.6.3 – 7.0.6.3
Cisco / Cisco Secure Firewall Management Center (FMC)7.0.7 – 7.0.7
Cisco / Cisco Secure Firewall Management Center (FMC)7.0.8 – 7.0.8
Cisco / Cisco Secure Firewall Management Center (FMC)7.0.8.1 – 7.0.8.1
Cisco / Cisco Secure Firewall Management Center (FMC)7.1.0 – 7.1.0
Cisco / Cisco Secure Firewall Management Center (FMC)7.1.0.1 – 7.1.0.1
Cisco / Cisco Secure Firewall Management Center (FMC)7.1.0.2 – 7.1.0.2
Cisco / Cisco Secure Firewall Management Center (FMC)7.1.0.3 – 7.1.0.3
Cisco / Cisco Secure Firewall Management Center (FMC)7.2.0 – 7.2.0
Cisco / Cisco Secure Firewall Management Center (FMC)7.2.1 – 7.2.1
Cisco / Cisco Secure Firewall Management Center (FMC)7.2.2 – 7.2.2
Cisco / Cisco Secure Firewall Management Center (FMC)7.2.0.1 – 7.2.0.1
Cisco / Cisco Secure Firewall Management Center (FMC)7.2.3 – 7.2.3
Cisco / Cisco Secure Firewall Management Center (FMC)7.2.3.1 – 7.2.3.1
Cisco / Cisco Secure Firewall Management Center (FMC)7.2.4 – 7.2.4
Cisco / Cisco Secure Firewall Management Center (FMC)7.2.4.1 – 7.2.4.1
Cisco / Cisco Secure Firewall Management Center (FMC)7.2.5 – 7.2.5
Cisco / Cisco Secure Firewall Management Center (FMC)7.2.5.1 – 7.2.5.1
Cisco / Cisco Secure Firewall Management Center (FMC)7.2.6 – 7.2.6
Cisco / Cisco Secure Firewall Management Center (FMC)7.2.7 – 7.2.7
Cisco / Cisco Secure Firewall Management Center (FMC)7.2.5.2 – 7.2.5.2
Cisco / Cisco Secure Firewall Management Center (FMC)7.2.8 – 7.2.8
Cisco / Cisco Secure Firewall Management Center (FMC)7.2.8.1 – 7.2.8.1
Cisco / Cisco Secure Firewall Management Center (FMC)7.2.9 – 7.2.9
Cisco / Cisco Secure Firewall Management Center (FMC)7.2.10 – 7.2.10
Cisco / Cisco Secure Firewall Management Center (FMC)7.2.10.2 – 7.2.10.2
Cisco / Cisco Secure Firewall Management Center (FMC)7.2.10.1 – 7.2.10.1
Cisco / Cisco Secure Firewall Management Center (FMC)7.3.0 – 7.3.0
Cisco / Cisco Secure Firewall Management Center (FMC)7.3.1 – 7.3.1
Cisco / Cisco Secure Firewall Management Center (FMC)7.3.1.1 – 7.3.1.1
Cisco / Cisco Secure Firewall Management Center (FMC)7.3.1.2 – 7.3.1.2
Cisco / Cisco Secure Firewall Management Center (FMC)7.4.0 – 7.4.0
Cisco / Cisco Secure Firewall Management Center (FMC)7.4.1 – 7.4.1
Cisco / Cisco Secure Firewall Management Center (FMC)7.4.1.1 – 7.4.1.1
Cisco / Cisco Secure Firewall Management Center (FMC)7.4.2 – 7.4.2
Cisco / Cisco Secure Firewall Management Center (FMC)7.4.2.1 – 7.4.2.1
Cisco / Cisco Secure Firewall Management Center (FMC)7.4.2.2 – 7.4.2.2
Cisco / Cisco Secure Firewall Management Center (FMC)7.4.2.3 – 7.4.2.3
Cisco / Cisco Secure Firewall Management Center (FMC)7.4.2.4 – 7.4.2.4
Cisco / Cisco Secure Firewall Management Center (FMC)7.4.3 – 7.4.3
Cisco / Cisco Secure Firewall Management Center (FMC)7.6.0 – 7.6.0
Cisco / Cisco Secure Firewall Management Center (FMC)7.6.1 – 7.6.1
Cisco / Cisco Secure Firewall Management Center (FMC)7.6.2 – 7.6.2
Cisco / Cisco Secure Firewall Management Center (FMC)7.6.2.1 – 7.6.2.1
Cisco / Cisco Secure Firewall Management Center (FMC)7.6.3 – 7.6.3
Cisco / Cisco Secure Firewall Management Center (FMC)7.7.0 – 7.7.0
Cisco / Cisco Secure Firewall Management Center (FMC)7.7.10 – 7.7.10
Cisco / Cisco Secure Firewall Management Center (FMC)7.7.10.1 – 7.7.10.1
Cisco / Cisco Secure Firewall Management Center (FMC)7.7.11 – 7.7.11
Cisco / Cisco Secure Firewall Management Center (FMC)7.6.4 – 7.6.4
Cisco / Cisco Secure Firewall Management Center (FMC)10.0.0 – 10.0.0
Cisco / Cisco Secure Firewall Management Center (FMC)7.4.4 – 7.4.4
Cisco / Cisco Secure Firewall Management Center (FMC)7.4.5 – 7.4.5
Cisco / Cisco Secure Firewall Management Center (FMC)7.0.9 – 7.0.9
Cisco / Cisco Secure Firewall Management Center (FMC)7.2.11 – 7.2.11
Cisco / Cisco Secure Firewall Management Center (FMC)7.7.12 – 7.7.12
Cisco / Cisco Secure Firewall Management Center (FMC)7.6.5 – 7.6.5
Cisco / Cisco Secure Firewall Management Center (FMC)7.4.6 – 7.4.6
Cisco / Cisco Secure Firewall Management Center (FMC)10.0.1 – 10.0.1
Cisco / Cisco Secure Firewall Management Center (FMC)7.4.7 – 7.4.7
Cisco / secure_firewall_management_center7.0.0 – 7.0.0
Cisco / secure_firewall_management_center7.0.0.1 – 7.0.0.1
Cisco / secure_firewall_management_center7.0.1 – 7.0.1
Cisco / secure_firewall_management_center7.0.1.1 – 7.0.1.1
Cisco / secure_firewall_management_center7.0.2 – 7.0.2
Cisco / secure_firewall_management_center7.0.2.1 – 7.0.2.1
Cisco / secure_firewall_management_center7.0.3 – 7.0.3
Cisco / secure_firewall_management_center7.0.4 – 7.0.4
Cisco / secure_firewall_management_center7.0.5 – 7.0.5
Cisco / secure_firewall_management_center7.0.6 – 7.0.6
Cisco / secure_firewall_management_center7.0.6.1 – 7.0.6.1
Cisco / secure_firewall_management_center7.0.6.2 – 7.0.6.2
Cisco / secure_firewall_management_center7.0.6.3 – 7.0.6.3
Cisco / secure_firewall_management_center7.0.7 – 7.0.7
Cisco / secure_firewall_management_center7.0.8 – 7.0.8
Cisco / secure_firewall_management_center7.0.8.1 – 7.0.8.1
Cisco / secure_firewall_management_center7.0.9 – 7.0.9
Cisco / secure_firewall_management_center7.1.0 – 7.1.0
Cisco / secure_firewall_management_center7.1.0.1 – 7.1.0.1
Cisco / secure_firewall_management_center7.1.0.2 – 7.1.0.2
Cisco / secure_firewall_management_center7.1.0.3 – 7.1.0.3
Cisco / secure_firewall_management_center7.2.0 – 7.2.0
Cisco / secure_firewall_management_center7.2.0.1 – 7.2.0.1
Cisco / secure_firewall_management_center7.2.1 – 7.2.1
Cisco / secure_firewall_management_center7.2.2 – 7.2.2
Cisco / secure_firewall_management_center7.2.3 – 7.2.3
Cisco / secure_firewall_management_center7.2.3.1 – 7.2.3.1
Cisco / secure_firewall_management_center7.2.4 – 7.2.4
Cisco / secure_firewall_management_center7.2.4.1 – 7.2.4.1
Cisco / secure_firewall_management_center7.2.5 – 7.2.5
Cisco / secure_firewall_management_center7.2.5.1 – 7.2.5.1
Cisco / secure_firewall_management_center7.2.5.2 – 7.2.5.2
Cisco / secure_firewall_management_center7.2.6 – 7.2.6
Cisco / secure_firewall_management_center7.2.7 – 7.2.7
Cisco / secure_firewall_management_center7.2.8 – 7.2.8
Cisco / secure_firewall_management_center7.2.8.1 – 7.2.8.1
Cisco / secure_firewall_management_center7.2.9 – 7.2.9
Cisco / secure_firewall_management_center7.2.10 – 7.2.10
Cisco / secure_firewall_management_center7.2.10.1 – 7.2.10.1
Cisco / secure_firewall_management_center7.2.10.2 – 7.2.10.2
Cisco / secure_firewall_management_center7.2.11 – 7.2.11
Cisco / secure_firewall_management_center7.3.0 – 7.3.0
Cisco / secure_firewall_management_center7.3.1 – 7.3.1
Cisco / secure_firewall_management_center7.3.1.1 – 7.3.1.1
Cisco / secure_firewall_management_center7.3.1.2 – 7.3.1.2
Cisco / secure_firewall_management_center7.4.0 – 7.4.0
Cisco / secure_firewall_management_center7.4.1 – 7.4.1
Cisco / secure_firewall_management_center7.4.1.1 – 7.4.1.1
Cisco / secure_firewall_management_center7.4.2 – 7.4.2
Cisco / secure_firewall_management_center7.4.2.1 – 7.4.2.1
Cisco / secure_firewall_management_center7.4.2.2 – 7.4.2.2
Cisco / secure_firewall_management_center7.4.2.3 – 7.4.2.3
Cisco / secure_firewall_management_center7.4.2.4 – 7.4.2.4
Cisco / secure_firewall_management_center7.4.3 – 7.4.3
Cisco / secure_firewall_management_center7.4.4 – 7.4.4
Cisco / secure_firewall_management_center7.4.5 – 7.4.5
Cisco / secure_firewall_management_center7.4.6 – 7.4.6
Cisco / secure_firewall_management_center7.4.7 – 7.4.7
Cisco / secure_firewall_management_center7.6.0 – 7.6.0
Cisco / secure_firewall_management_center7.6.1 – 7.6.1
Cisco / secure_firewall_management_center7.6.2 – 7.6.2
Cisco / secure_firewall_management_center7.6.2.1 – 7.6.2.1
Cisco / secure_firewall_management_center7.6.3 – 7.6.3
Cisco / secure_firewall_management_center7.6.4 – 7.6.4
Cisco / secure_firewall_management_center7.6.5 – 7.6.5
Cisco / secure_firewall_management_center7.7.0 – 7.7.0
Cisco / secure_firewall_management_center7.7.10 – 7.7.10
Cisco / secure_firewall_management_center7.7.10.1 – 7.7.10.1
Cisco / secure_firewall_management_center7.7.11 – 7.7.11
Cisco / secure_firewall_management_center7.7.12 – 7.7.12
Cisco / secure_firewall_management_center10.0.0 – 10.0.0
Cisco / secure_firewall_management_center10.0.1 – 10.0.1

Exploits & proofs of concept

nucleiCisco Secure Firewall Management Center - Authentication Bypassby theamanrawat

News coverage

Cisco FMC Flaws Exploited to Steal Credentials and Deploy Qilin RansomwareThe Hacker News · 10d ago
CISA Flags Exploited Cisco, Citrix, Fortinet Flaws, Sets Sept. 12 Federal Patch DeadlineThe Hacker News · 11d ago
Cisco confirms CVE-2026-20079 Secure FMC flaw exploited in attacksBleepingComputer · 11d ago

References

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

Updated 11m ago · 8 sources