CVE-2026-20018 MEDIUM

CVE-2026-20018: Cisco Firepower Management Center Software and Firepower Threat Defense Path Traversal Vulnerability

Vendor Cisco
Product Cisco Secure Firewall Management Center (FMC)
Weakness CWE-27
Published March 4, 2026
Last update March 4, 2026

CVSS base score

5.9/10
Attack vector Network
Attack complexity High
Privileges required High
User interaction None
Confidentiality None
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H

What the vulnerability does

01Description

A vulnerability in the sftunnel functionality of Cisco Secure Firewall Management Center (FMC) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an authenticated, remote attacker with administrative privileges to write arbitrary files as root on the underlying operating system. This vulnerability is due to insufficient validation of the directory path during file synchronization. An attacker could exploit this vulnerability by crafting a directory path outside of the expected file location. A successful exploit could allow the attacker to create or replace any file on the underlying operating system.

Key dates

02Disclosure timeline

March 4, 2026 CVE published
March 4, 2026 Record updated