CVE-2026-110908
8.8HighPublished 15 Oct 2026 · NVD status: Awaiting Analysis · AI triage by gemini-3.8-flash
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Impact
- Full C/I/A compromise
- Weakness
- CWE-78
Impact
Authenticated WebGUI users with access to the FRR status page can execute arbitrary shell commands as root. The attacker only needs low-privilege access with the page-status-frr permission.
Root cause
Improper escaping allows user-supplied filter input to break out of a single-quoted sed expression passed into a popen() shell pipeline.
Affected systems
Netgate pfSense FRR package (pfSense-pkg-frr) 2.0.2_1 and source revision 2.1.2_1 on pfSense Plus and CE.
CVSS v3.1 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Fix & remediation
Upgrade the pfSense-pkg-frr package via the pfSense package manager on pfSense Plus 26.07/26.03.1 or CE 2.9.0/2.8.1. If patching must wait, revoke the page-status-frr privilege from untrusted WebGUI user accounts or restrict access to the WebGUI.
$ pkg upgrade pfSense-pkg-frrAI-suggested. Run it in staging first and check it against the vendor advisory. Why?
NVD 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.