RCE in Netgate Pfsense Ce
CVE-2026-111217
Netgate pfSense CE through 2.9.0 contains an OS command injection vulnerability that allows authenticated users with Virtual IP edit privileges to execute commands as root by storing an unvalidated CARP VHID. Attackers can supply a VHID containing shell metacharacters that executes via interface_ipalias_configure() ifconfig calls or get_carp_interface_status() when CARP status is rendered.
Vulnerability class: Command Injection (OS Command Injection)
Published .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/abraxas/pfsense-carp-vhid (technical-description, exploit)
- abraxaslabs.tech/research/pfsense-ce-leftovers (technical-description)
- abraxaslabs.tech/research/pfsense-carp-vhid (technical-description)
- github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/us… (technical-description)
- github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/et… (technical-description)
- github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/et… (technical-description)
- www.vulncheck.com/advisories/netgate-pfsense-ce-through-2.9.0-os-command-inject… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-111217?
- CVE-2026-111217 is a high-severity vulnerability in Netgate Pfsense Ce, classified under OS Command Injection. CVSS score: 7.2/10. Published 2026-10-15.
- How severe is CVE-2026-111217?
- High severity. CVSS v3 base score is 7.2 out of 10.