CVE-2026-111217CWE-78command-injection

CVE-2026-111217

High · published October 15, 2026

CVSS v3.1
7.2
EPSS
7%
Percentile
93.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.2 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
8.6 · 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
EPSS
0.06671 · 93.9th percentile
Weakness
CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2026-10-15T23:17Z
Affected products (1)
ProductVersionsFixed in
pfsense/pfsense≤ 2.9.0—
References (7)
https://abraxaslabs.tech/research/pfsense-carp-vhid · [email protected]https://abraxaslabs.tech/research/pfsense-ce-leftovers · [email protected]https://github.com/abraxas/pfsense-carp-vhid · [email protected]https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/interfaces.inc#L3236-L3238 · [email protected]https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/pfsense-utils.inc#L794 · [email protected]https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/usr/local/pfSense/include/www/firewall_virtual_ip.inc#L200 · [email protected]https://www.vulncheck.com/advisories/netgate-pfsense-ce-through-2.9.0-os-command-injection-via-carp-vhid · [email protected]
EPSS history
Timeline
  • 17 OCT 03:28Z
    EPSS moved — → 7%
    epss
  • 15 OCT 18:46Z
    Netgate pfSense CE through 2.9.0 OS Command Injection via CARP VHID
    cvelistv5
  • 15 OCT 18:46Z
    Netgate pfSense CE through 2.9.0 OS Command Injection via CARP VHID
    cvelistv5