Vulnerability in Netgate pfSense CE

[ Description ]Official description

Netgate pfSense CE through 2.9.0 contains an authorization bypass vulnerability that allows read-only WebGUI users to replace config.xml because config_restore() and config_install() ignore the 'User - Config: Deny Config Write' privilege. Attackers holding page privileges for services_acb.php, uploadconfig.php, diag_confbak.php, or diag_backup.php can install a chosen config.xml to gain root-level code execution after reload or reboot.

[ 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-leftoversIssue Tracking
• github.com/abraxas/pfsense-config-readonly-restoreThird Party Advisory
• github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/co…Product
• github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/co…Product
• www.vulncheck.com/advisories/netgate-pfsense-ce-through-2.9.0-authorization-bypass-via-…Third Party Advisory