---
id: CVE-2021-1448
title: >-
  A vulnerability in the CLI of Cisco Firepower Threat Defense (FTD) Software
  could allow an authenticated, local attacker to execute arbitrary commands
  with root privileges on the underlying operating system of an affected device
  that is …
summary: >-
  A vulnerability in the CLI of Cisco Firepower Threat Defense (FTD) Software
  could allow an authenticated, local attacker to execute arbitrary commands
  with root privileges on the underlying operating system of an affected device
  that is …
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-20
  - CWE-78
vendor: cisco
product: secure_firewall_threat_defense
affected:
  - 'secure_firewall_threat_defense >= 6.4.0, < 6.4.0.10'
  - 'secure_firewall_threat_defense >= 6.5.0, < 6.5.0.5'
  - 'secure_firewall_threat_defense >= 6.6.0, < 6.6.1'
patched:
  - secure_firewall_threat_defense 6.6.1
published: '2021-04-29'
updated: '2026-08-11'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2021-1448'
references:
  - url: >-
      https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-cmdinj-vWY5wqZT
    label: psirt@cisco.com
  - url: >-
      https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-cmdinj-vWY5wqZT
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00302
epssPercentile: 0.20343
ingestedAt: '2026-08-18T12:28:07.028Z'
---

## Overview

A vulnerability in the CLI of Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, local attacker to execute arbitrary commands with root privileges on the underlying operating system of an affected device that is running in multi-instance mode. This vulnerability is due to insufficient validation of user-supplied command arguments. An attacker could exploit this vulnerability by submitting crafted input to the affected command. A successful exploit could allow the attacker to execute commands on the underlying operating system with root privileges.

## Affected

- `secure_firewall_threat_defense >= 6.4.0, < 6.4.0.10`
- `secure_firewall_threat_defense >= 6.5.0, < 6.5.0.5`
- `secure_firewall_threat_defense >= 6.6.0, < 6.6.1`

## Remediation

Upgrade past the affected range:

- `secure_firewall_threat_defense 6.6.1`