CVE-2026-111226CWE-78command-injection

CVE-2026-111226

High · published October 15, 2026

CVSS v3.1
7.2
EPSS
7%
Percentile
93.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.2 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
8.6 · CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.06548 · 93.8th percentile
Weakness
CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2026-10-15T23:17Z
References (5)
https://abraxaslabs.tech/research/pfsense-ce-leftovers · [email protected]https://github.com/abraxas/pfsense-sshguard-crlf · [email protected]https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/syslog.inc#L531-L563 · [email protected]https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/usr/local/pfSense/include/www/system_advanced_admin.inc#L355-L381 · [email protected]https://www.vulncheck.com/advisories/netgate-pfsense-ce-2.4.5-through-2.9.0-os-command-injection-via-system-advanced-admin-php · [email protected]
EPSS history
Timeline
  • 17 OCT 03:28Z
    EPSS moved — → 7%
    epss
  • 15 OCT 18:46Z
    Netgate pfSense CE 2.4.5 through 2.9.0 OS Command Injection via system_advanced_admin.php
    cvelistv5
  • 15 OCT 18:46Z
    Netgate pfSense CE 2.4.5 through 2.9.0 OS Command Injection via system_advanced_admin.php
    cvelistv5