CVE-2026-111214
HIGH 8.6Netgate 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.
10.8% modeled chance of exploitation in the next 30 days (96th percentile). Prioritize remediation.
Exploitation likelihood
10.8%chance of exploitation in 30 days · 96th percentile
Impact if exploited
8.6CVSS 4.0 · HIGH
- ConfidentialityHigh
- IntegrityHigh
- AvailabilityHigh
What an attacker needs
- ✓Access: Reachable over the network — no local access needed
- ⚠Privileges: Requires an admin / high-privilege account
- ✓User interaction: No user interaction needed
- ✓Complexity: No special conditions — reliably repeatable
- ✓Requirements: No special attack requirements
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept
No public PoC is currently catalogued.
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Data snapshot:
Weakness (CWE)
- CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CVSS 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
References and research data (JSON)
Known Affected Software Configurations
| Vendor | Product | Version range |
|---|---|---|
| Pfsense | Pfsense | ≥ 2.7.0 and ≤ 2.9.0 |
All CVSS metrics
- HIGH 8.6 v4.0 · CNA Primary
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 - HIGH 7.2 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H - HIGH 8.6 v4.0 · NVD Secondary
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - HIGH 7.2 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
References
Exploit-tagged references (not proof of a PoC)
- https://github.com/abraxas/pfsense-qinq-parent-if CVE record · VulnCheck · Updated 2026-10-15T18:46:17.293Z
NVD · CVE-2026-111214 · Updated 2026-10-19T20:44:11.483 - https://abraxaslabs.tech/research/pfsense-qinq-parent-if CVE record · VulnCheck · Updated 2026-10-15T18:46:17.293Z
NVD · CVE-2026-111214 · Updated 2026-10-19T20:44:11.483
Advisories
- https://www.vulncheck.com/advisories/netgate-pfsense-ce-2.7.0-through-2.9.0-os-command-injection-via-interfaces-qinq-edit-php CVE record · VulnCheck · Updated 2026-10-15T18:46:17.293Z
NVD · CVE-2026-111214 · Updated 2026-10-19T20:44:11.483 - https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-102326 EUVD · EUVD-2026-102326
Technical & other
- https://abraxaslabs.tech/research/pfsense-ce-leftovers CVE record · VulnCheck · Updated 2026-10-15T18:46:17.293Z
NVD · CVE-2026-111214 · Updated 2026-10-19T20:44:11.483 - https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/usr/local/www/interfaces_qinq_edit.php#L136 CVE record · VulnCheck · Updated 2026-10-15T18:46:17.293Z
NVD · CVE-2026-111214 · Updated 2026-10-19T20:44:11.483 - https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/usr/local/www/interfaces_qinq_edit.php#L212 CVE record · VulnCheck · Updated 2026-10-15T18:46:17.293Z
NVD · CVE-2026-111214 · Updated 2026-10-19T20:44:11.483 - https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/interfaces.inc#L620 CVE record · VulnCheck · Updated 2026-10-15T18:46:17.293Z
NVD · CVE-2026-111214 · Updated 2026-10-19T20:44:11.483