CVE-2026-111217: netgate pfsense ce OS Command Injection

Vulnerability summary

CVE-2026-111217 is a high (CVSS 8.6) OS Command Injection vulnerability in netgate pfsense ce. EPSS estimates a 7.05% chance of exploitation in the next 30 days, higher than 94.1% of scored vulnerabilities. 2 public exploits are recorded.

Timeline

1. 15-10-2026
   PublishedVulnerability first disclosed.
2. 21-10-2026
   Last modifiedVulnerability information updated.

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.

• CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.