Vulnerability · Published Oct 15, 2026 · Assigned by VulnCheck

CVE-2026-111217Netgate pfSense CE through 2.9.0 OS Command Injection via CARP VHID

High 7.2

In plain English

A high-severity OS command injection in pfSense CE from Netgate. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 7.0% (higher than 94% of all known vulnerabilities).

Severity (CVSS 3.1)7.2High

Exploit odds (30 days)7.0%top 5.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
Netgate	pfSense CE	0 – through 2.9.0

Weakness: CWE-78 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

References

https://github.com/abraxas/pfsense-carp-vhid exploit, technical-description
https://abraxaslabs.tech/research/pfsense-ce-leftovers technical-description
https://abraxaslabs.tech/research/pfsense-carp-vhid technical-description
https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/usr/local/pfSense/include/www/firewall_virtual_ip.inc#L200 technical-description
https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/interfaces.inc#L3236-L3238 technical-description
https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/pfsense-utils.inc#L794 technical-description
VulnCheck Advisory: Netgate pfSense CE through 2.9.0 OS Command Injection via CARP VHID third-party-advisory