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CVE-2026-111231

7.2, high

Netgate pfSense CE Incorrect Authorization Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
7.2, high high CVSS v3.1
EPSS, next 30 days
0.9% higher than 59.5% of scored CVEs
Exploitation
No public evidence
Published
15 Oct 20262 days ago

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.

Details

Vendor
Netgate
Product
pfSense CE
Weakness
CWE-863 (opens in a new tab)
Status
Undergoing analysis
Updated
15 Oct 2026
Assigner
disclosure@vulncheck.com

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

References 5

Other references 5

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Netgate CVEs

Every Netgate CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-111214 Netgate pfSense CE OS Command Injection Vulnerability EPSS 9% 7.2, high
  • CVE-2026-111216 Netgate pfSense CE OS Command Injection Vulnerability EPSS 7% 7.2, high
  • CVE-2026-111217 Netgate pfSense CE OS Command Injection Vulnerability EPSS 7% 7.2, high
  • CVE-2026-111224 Netgate pfSense CE OS Command Injection Vulnerability EPSS 5% 7.5, high
  • CVE-2026-111226 Netgate pfSense CE OS Command Injection Vulnerability EPSS 7% 7.2, high
  • CVE-2026-111229 Netgate pfSense CE OS Command Injection Vulnerability EPSS 6% 7.2, high

Beyond this page

Is CVE-2026-111231 in your network?

This page tells you how dangerous CVE-2026-111231 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

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    Find it before attackers do

    Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2026-111231 comes with the devices to patch.

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  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.