CVE-2026-111214 Netgate CVE debrief

Who should care

System administrators and security teams responsible for pfSense CE installations, particularly those with versions 2.7.0 through 2.9.0, should assess exposure and prioritize patching.

Why it matters

CVE-2026-111214 is a high-severity OS command injection vulnerability in Netgate pfSense CE 2.7.0 through 2.9.0. Authenticated users with QinQ edit privilege can execute commands as root, potentially leading to system compromise and lateral movement.

• Potential for authenticated command execution as root
• Exposure of sensitive system configurations
• Possible lateral movement within the network
• Verification of QinQ edit privilege access and usage

Technical summary

The vulnerability allows authenticated users with QinQ edit privilege to inject OS commands via interfaces_qinq_edit.php. This is achieved by storing an unvalidated parent interface name, which can be used to execute commands as root when editing the QinQ entry. The affected versions are pfSense CE 2.7.0 through 2.9.0. The vulnerability has a high severity score of 8.6 and is classified as HIGH. The CVE record was published on 2026-10-15T18:46:17.293Z and has not been modified since then. The vulnerability can lead to potential system compromise and lateral movement.

Defensive priority

High priority for patching and verification

Recommended defensive actions

• Patch pfSense CE to version 2.9.1 or later
• Verify QinQ edit privilege access and usage
• Monitor for suspicious ifconfig commands
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and source item provide details on the vulnerability, including affected versions and technical descriptions. However, there is limited information on exploitation and impact. Defenders should verify the affected pfSense CE versions 2.7.0 through 2.9.0 and assess the potential for authenticated command execution as root. The vulnerability allows attackers to inject OS commands via interfaces_qinq_edit.php by storing an unvalidated parent interface name. This can be used to execute commands as root when editing the QinQ.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.