CVE-2026-111226
CVE-2026-111226 · Netgate pfSense CE 2.4.5 through 2.9.0 OS Command Injection via system_advanced_admin.php
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 8.6 · High · EPSS 6.5%
- Published
- Updated
Affected products and versions
pfsense ce
- Versions
- ≥ 2.4.5, ≤ 2.9.0: Affected (semver)
No fix published
Original sources
- https://github.com/abraxas/pfsense-sshguard-crlf
- https://abraxaslabs.tech/research/pfsense-ce-leftovers
- https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/usr/local/pfSense/include/www/system_advanced_admin.inc#L355-L381
- https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/syslog.inc#L531-L563
- https://www.vulncheck.com/advisories/netgate-pfsense-ce-2.4.5-through-2.9.0-os-command-injection-via-system-advanced-admin-php
- https://nvd.nist.gov/vuln/detail/CVE-2026-111226