CVE-2026-110908
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OS Command Injection in Netgate pfSense FRR Package

Publication date: 2026-10-15

Last updated on: 2026-10-15

Assigner: MITRE

Description
Netgate pfSense FRR package (pfSense-pkg-frr) 2.0.2_1 and source revision 2.1.2_1 contain an OS command injection vulnerability in the FRR status filter. An authenticated WebGUI user with only the page-status-frr privilege can supply a filter value that breaks out of a single-quoted sed expression into which escapeshellarg() output is concatenated. Shell command substitution is then evaluated by a popen() pipeline, allowing attacker-selected commands to execute as root. There are updated FRR packages for pfSense Plus 26.07/26.03.1 and CE 2.9.0/2.8.1.

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Meta Information

Published
2026-10-15
Last Modified
2026-10-15
Generated
2026-10-19
AI Q&A
2026-10-15
EPSS Evaluated
2026-10-18
NVD
CVE-2026-110908
EUVD
EUVD-2026-101816

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
Netgate pfSense-pkg-frr 2.0.2_1
Netgate pfSense-pkg-frr 2.1.2_1

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-78 The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

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Executive Summary

This vulnerability is an OS command injection flaw in the Netgate pfSense FRR package versions 2.0.2_1 and source revision 2.1.2_1. An authenticated user with limited privileges can exploit a filter input to break out of a single-quoted sed expression. This allows shell command substitution, which is then executed via a popen() pipeline with root privileges.

Detection Guidance

Check if the vulnerable pfSense-pkg-frr package versions 2.0.2_1 or 2.1.2_1 are installed by running: pkg info pfSense-pkg-frr. If installed, verify if the status_frr.php file exists in the pfSense web interface directory.

Impact Analysis

An attacker with access to the pfSense WebGUI and the page-status-frr privilege could execute arbitrary commands as the root user. This could lead to full system compromise, unauthorized access, data theft, or disruption of network services.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, violating confidentiality requirements in GDPR and HIPAA. Organizations using affected pfSense versions may face compliance violations, legal penalties, and reputational damage if exploited.

Mitigation Strategies

Update the pfSense-pkg-frr package to the fixed versions (pfSense Plus 26.07/26.03.1 or CE 2.9.0/2.8.1) immediately. Remove unnecessary user privileges, especially the page-status-frr privilege, to limit potential attack vectors.

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