Vulnerability in Netgate pfSense CE

[ Description ]Official description

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.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund15 Oct 2026WID-SEC-2026-3983

  Netgate pfSense: Multiple vulnerabilities Translated from German

  CVE-2026-111230CVE-2026-111225CVE-2026-111220+17 more CVEs

[ References ]References

• abraxaslabs.tech/research/pfsense-ce-leftovers
• github.com/abraxas/pfsense-sshguard-crlf
• github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/sy…
• github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/usr/local/…
• www.vulncheck.com/advisories/netgate-pfsense-ce-2.4.5-through-2.9.0-os-command-injectio…