# CVE-2026-20018

## Summary

- **CVE ID:** CVE-2026-20018
- **Severity:** MEDIUM
- **CVSS Score:** 5.9 (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H)
- **CWE:** CWE-27
- **Published:** Mar 4, 2026
- **Last Modified:** Mar 12, 2026

## Description

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.

## Affected Products

- Cisco — Cisco Secure Firewall Management Center (FMC) (7.0.0)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.0.0.1)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.0.1)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.1.0)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.0.1.1)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.1.0.1)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.0.2)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.2.0)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.0.2.1)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.0.3)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.1.0.2)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.2.0.1)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.0.4)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.2.1)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.0.5)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.3.0)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.2.2)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.3.1)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.5)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.2.3)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.1.0.3)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.2.3.1)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.2.4)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.0.6)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.2.4.1)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.2.5)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.3.1.1)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.4.0)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.0.6.1)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.2.5.1)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.4.1)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.2.6)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.4.1.1)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.0.6.2)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.2.7)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.2.5.2)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.3.1.2)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.2.8)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.6.0)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.4.2)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.2.8.1)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.0.6.3)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.4.2.1)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.2.9)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.0.7)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.7.0)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.4.2.2)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.2.10)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.6.1)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.4.2.3)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.0.8)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.6.2)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.7.10)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.2.10.1)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.0.8.1)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.6.2.1)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.2.10.2)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.7.10.1)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.4.2.4)
- Cisco — Cisco Secure Firewall Management Center (FMC) (7.4.3)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.0)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.0.1)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.1)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.1.0)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.1.1)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.1.0.1)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.2)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.0)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.2.1)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.3)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.1.0.2)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.0.1)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.4)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.1)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.5)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.3.0)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.2)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.3)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.3.1)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.1.0.3)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.4)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.6)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.4.1)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.3.1.1)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.4.0)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.6.1)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.5.1)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.4.1)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.6)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.6.2)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.4.1.1)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.7)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.5.2)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.3.1.2)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.8)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.6.0)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.4.2)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.8.1)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.6.3)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.4.2.1)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.9)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.7)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.7.0)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.4.2.2)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.10)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.6.1)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.4.2.3)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.8)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.6.2)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.7.10)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.8.1)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.6.2.1)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.7.10.1)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.4.2.4)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.10.2)
- Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.4.3)

## References

- [CNA](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftdfmc-dir-trav-wERgjhWq)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.42%
- **EPSS Percentile:** 35.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._