---
id: CVE-2026-111226
title: >-
  pfSense CE 2.4.5 through 2.9.0 contains an OS command injection vulnerability
  that allows authenticated WebGUI users with Advanced Admin Access privilege to
  execute commands as root via Login Protection settings
summary: >-
  pfSense CE 2.4.5 through 2.9.0 contains an OS command injection vulnerability
  that allows authenticated WebGUI users with Advanced Admin Access privilege to
  execute commands as root via Login Protection settings. Attackers can submit
  ssh…
severity: high
cvss: 7.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-78
vendor: Netgate
product: pfSense CE
affected:
  - pfsense_ce >= 2.4.5 <= 2.9.0
published: '2026-10-15'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T19:17:35.373'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-111226'
references:
  - url: 'https://abraxaslabs.tech/research/pfsense-ce-leftovers'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/abraxas/pfsense-sshguard-crlf'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/syslog.inc#L531-L563
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/usr/local/pfSense/include/www/system_advanced_admin.inc#L355-L381
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/netgate-pfsense-ce-2.4.5-through-2.9.0-os-command-injection-via-system-advanced-admin-php
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-15T19:25:46.430Z'
---

## Overview

pfSense CE 2.4.5 through 2.9.0 contains an OS command injection vulnerability that allows authenticated WebGUI users with Advanced Admin Access privilege to execute commands as root via Login Protection settings. Attackers can submit sshguard threshold, block time, or detection time values containing newlines or $(...) that are written unvalidated to sshguard.conf and sourced as root on restart.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.