CVE-2026-20079
CRITICALCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Lifecycle Timeline
4Description
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.
Analysis
Unauthenticated auth bypass in Cisco FMC web interface. CVSS 10.0.
Sign in for full analysis, threat intelligence, and remediation guidance.
Remediation
Within 24 hours: Isolate affected FMC instances from untrusted networks and restrict administrative access to authorized personnel only. Within 7 days: Implement network segmentation to limit FMC exposure, enable comprehensive logging and monitoring for suspicious activity, and contact Cisco for interim security guidance. …
Sign in for detailed remediation steps.
Priority Score
Share
External POC / Exploit Code
Leaving vuln.today