CVE-2020-3459

Cisco FXOS Software for Firepower 4100/9300 Series Command Injection Vulnerability

HIGH

7.8

CVSS Score

Published: October 21, 2020 at 06:35 PM UTC

Updated: June 17, 2026 at 03:18 AM UTC

17 products affected across 1 vendorFirepower Extensible Operating SystemFirepower 4110Firepower 4140

Using Cisco Firepower Extensible Operating System (FXOS) by Cisco?

Get instant alerts when new vulnerabilities affect Cisco Firepower Extensible Operating System (FXOS) - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

HIGH7.8

Exploit prediction

EPSS 0.4%

SSVC

No known exploit

Description

A vulnerability in the CLI of Cisco FXOS Software could allow an authenticated, local attacker to inject arbitrary commands that are executed with root privileges. The vulnerability is due to insufficient input validation of commands supplied by the user. An attacker could exploit this vulnerability by authenticating to a device and 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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Firepower Extensible Operating System · Cisco

95%

v < 2.4.1.2662.6 ≤ v < 2.6.1.2042.7 ≤ v < 2.7.1.1312.8 ≤ v < 2.8.1.125

Affected range stops below 2.4.1.266, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.6.1.204, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.7.1.131, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.8.1.125, so it looks safe — our inference, not a vendor statement

cisco-firepower-4110 (environment) · cisco-firepower-4112 (environment) · cisco-firepower-4115 (environment) · cisco-firepower-4120 (environment) · cisco-firepower-4125 (environment) · cisco-firepower-4140 (environment) · cisco-firepower-4145 (environment) · cisco-firepower-4150 (environment) · cisco-firepower-9300-sm-24 (environment) · cisco-firepower-9300-sm-36 (environment) · cisco-firepower-9300-sm-40 (environment) · cisco-firepower-9300-sm-44 (environment) · cisco-firepower-9300-sm-44-x-3 (environment) · cisco-firepower-9300-sm-48 (environment) · cisco-firepower-9300-sm-56 (environment) · cisco-firepower-9300-sm-56-x-3 (environment)

Firepower 4110 · Ciscodevice

80%

All versions

Firepower 4112 · Ciscodevice

80%

All versions

Firepower 4115 · Ciscodevice

80%

All versions

Firepower 4120 · Ciscodevice

80%

All versions