CVE-2026-20079

critical Cisco
CVSS v3 Base Score
10.0
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS Score
35.9%
Exploitation probability in 30 days
Top 2% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Published: March 4, 2026 (186 days ago)
Last Modified: August 26, 2026
Vendor: Cisco
Source: NVD

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. 

CWE

CWE-288

References

🔗 sec.cloudapps.cisco.com 🔗 seclists.org