Is CVE-2026-111231 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-111231 being exploited in the wild.

How severe is CVE-2026-111231?

High severity, with a CVSS score of 7.2, published 15 October 2026.

Which products and versions are affected?

Netgate Pfsense Ce through 2.9.0.

Is there a fix for CVE-2026-111231?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-111231 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-111231?

Check whether you run Netgate Pfsense Ce or Pfsense at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-111231: Netgate pfSense CE authorization bypass in config restore

CVE-2026-111231 · Severity: high · CVSS 7.2 · Published 2026-10-15

pfSense CE is a firewall appliance that protects networks through a web-based management interface. An authorization bypass vulnerability allows users with limited read-only WebGUI access to replace the system configuration file and gain complete control of the firewall, requiring only a reboot to execute arbitrary code with root privileges. This could give attackers full control over network traffic and security policies.

Technologies: Netgate Pfsense Ce, Pfsense. Vendors: Netgate, Pfsense.

Quick answers

Is CVE-2026-111231 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-111231 being exploited in the wild.
How severe is CVE-2026-111231?: High severity, with a CVSS score of 7.2, published 15 October 2026.
Which products and versions are affected?: Netgate Pfsense Ce through 2.9.0.
Is there a fix for CVE-2026-111231?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-111231 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-111231?: Check whether you run Netgate Pfsense Ce or Pfsense at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability exists in the config_restore() and config_install() functions, which fail to enforce the 'User - Config: Deny Config Write' privilege check. An attacker with page-level access to any of services_acb.php, uploadconfig.php, diag_confbak.php, or diag_backup.php can upload and install a malicious config.xml, leading to root-level code execution upon system reload or reboot. The issue affects pfSense CE through version 2.9.0.

Affected products

Netgate pfSense CE through 2.9.0

Timeline

2026-10-15: disclosed

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.