MajorCritical vulnerability

CVE-2026-111231 (CVSS 8.6)

NVD · officialPublished Oct 15, 2026Risk 37/100EPSS 0.9%

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.

Technical details

CVSS

8.6

AV:NetworkAC:LowPR:HighUI:None

Evidence and sources

This record is attributed to NVD. Exploitation status and remediation guidance are kept separate from the vulnerability's technical severity.

Open primary source