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.
This CVE has been withdrawn by MITRE
MITRE marked CVE-2026-111231 as REJECTED on . It is no longer considered a valid vulnerability record. The original content below is preserved for historical reference only.
Reason given by MITRE
This CVE ID has been rejected because it does not describe a security vulnerability.
CVE-2026-111231
✕ Withdrawn — historical dataHIGHPre-NVD 7.2
7.2CVSS
- CVSS v3
- 7.2
- EchelonGraph score
- Not yet assessedThis CVE record was withdrawn by its numbering authority, so there is no vulnerability to rate.
- EPSS PROB
- —
- EPSS %ILE
- —
- KEV
- —Not applicable: this CVE ID was withdrawn
Published
October 15, 2026
Last Modified
October 26, 2026
References (5)
- disclosure@vulncheckhttps://abraxaslabs.tech/research/pfsense-ce-leftovers
- disclosure@vulncheckhttps://github.com/abraxas/pfsense-config-readonly-restore
- disclosure@vulncheckhttps://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/config.lib.inc#L588-L597
- disclosure@vulncheckhttps://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/config.lib.inc#L743-L798
- disclosure@vulncheckhttps://www.vulncheck.com/advisories/netgate-pfsense-ce-through-2.9.0-authorization-bypass-via-config-restore-and-config-install
Frequently asked(4)
What is CVE-2026-111231?
CVE-2026-111231 is a rejected CVE ID: its record was withdrawn on November 6, 2026 and no longer describes a vulnerability. Reason given: This CVE ID has been rejected because it does not describe a security vulnerability.
When was the CVE record for CVE-2026-111231 published?
The CVE record for CVE-2026-111231 was published on October 15, 2026. EchelonGraph's copy of the record carries a last-modified date of October 26, 2026; the record at its source may have been updated since.
What is the CVSS score of CVE-2026-111231?
CVE-2026-111231 has a CVSS base score of 7.2 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-111231?
There is nothing to remediate under CVE-2026-111231: it is a rejected (withdrawn) CVE ID and no longer describes a vulnerability.