Vulnerability · Published Oct 15, 2026 · Assigned by VulnCheck

CVE-2026-111229Netgate pfSense CE 2.7.0 through 2.9.0 Command Injection via Captive Portal HA Sync

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 6.4% (higher than 94% of all known vulnerabilities).

Severity (CVSS 3.1)7.2High

Exploit odds (30 days)6.4%top 6.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

pfSense CE 2.7.0 through 2.9.0 contains a command injection vulnerability in services_captiveportal_hasync.php that allows users with only the Captive Portal HA privilege to execute commands as root. Attackers can set backwardsyncip to a malicious XMLRPC server returning connected_users with shell metacharacters in ip or mac fields, which captiveportal_load_pfctl passes unescaped to a pfctl shell command.

Affected products (as reported)

Vendor	Product	Versions
Netgate	pfSense CE	2.7.0 – 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-cp-ha-pfctl exploit, technical-description
https://abraxaslabs.tech/research/pfsense-ce-leftovers technical-description
https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/captiveportal.inc#L2958-L2966 technical-description
https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/usr/local/www/services_captiveportal_hasync.php#L106-L140 technical-description
VulnCheck Advisory: Netgate pfSense CE 2.7.0 through 2.9.0 Command Injection via Captive Portal HA Sync third-party-advisory