Path traversal in Cisco Secure Firewall Management Center (formerly Firepower Management Center, FMC) - CVE-2026-20018
Published: March 4, 2026
Vulnerability identifier: #VU123531
CSH Severity: Low
CVSS v4: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N]
CVE-ID: CVE-2026-20018
CWE-ID: CWE-22
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to perform directory traversal attacks.
The vulnerability exists due to input validation error when processing directory traversal sequences in the sftunnel functionality. A remote privileged user can send a specially crafted HTTP request and read arbitrary files on the system as root.
Affected software
Cisco Secure Firewall Management Center (formerly Firepower Management Center, FMC)
How to mitigate CVE-2026-20018
Install updates from vendor's website.
Cisco Secure Firewall Management Center (formerly Firepower Management Center, FMC) - addressed in versions 7.0.9, 7.2.11, 7.4.4, 7.6.4, 7.7.11