CVE-2026-111231
High
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.
SeverityHigh
CVSS7.2
Exploit probability—
ProductPfsense
PublishedOct 15, 2026
First seenOct 15, 2026
Weakness typeCWE-863Incorrect authorization
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| pfsense pfsense | v ≤ 2.9.0 | — |
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