---
id: CVE-2026-111221
title: >-
  Netgate pfSense CE through 2.9.0 contains a configuration injection
  vulnerability that allows authenticated WebGUI users to inject mpd5 commands
  by submitting an unescaped RADIUS shared secret
summary: >-
  Netgate pfSense CE through 2.9.0 contains a configuration injection
  vulnerability that allows authenticated WebGUI users to inject mpd5 commands
  by submitting an unescaped RADIUS shared secret. Attackers with L2TP or PPPoE
  Server edit pr…
severity: medium
cvss: 6.6
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-93
vendor: Netgate
product: pfSense CE
affected:
  - pfsense_ce <= 2.9.0
published: '2026-10-15'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T19:17:34.650'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-111221'
references:
  - url: 'https://abraxaslabs.tech/research/pfsense-ce-leftovers'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/abraxas/pfsense-l2tp-radius-mpd'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/vpn.inc#L202-L215
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/vpn.inc#L428-L441
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/usr/local/www/vpn_l2tp.php#L137-L143
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/netgate-pfsense-ce-through-2.9.0-command-injection-via-radius-secret-mpd-conf-injection
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-15T19:25:46.428Z'
---

## Overview

Netgate pfSense CE through 2.9.0 contains a configuration injection vulnerability that allows authenticated WebGUI users to inject mpd5 commands by submitting an unescaped RADIUS shared secret. Attackers with L2TP or PPPoE Server edit privileges can POST a secret containing a quote and newline to vpn_l2tp.php or services_pppoe_edit.php, appending an up-script that executes as root when a session starts.

## Remediation

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