High severity · published Oct 15, 2026
CVE-2026-111229
Netgate pfSense CE 2.7.0 through 2.9.0 Command Injection via Captive Portal HA Sync
7.2
CVSS
6.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)6.4% · higher than 94% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PC
pfSense CE · Netgate
2.7.0 through 2.9.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-111229
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-111229
abraxaslabs.tech
https://abraxaslabs.tech/research/pfsense-ce-leftovers
github.com
https://github.com/abraxas/pfsense-cp-ha-pfctl
github.com
https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/captiveportal.inc#L2958-L2966
github.com
https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/usr/local/www/services_captiveportal_hasync.php#L106-L140
www.vulncheck.com
https://www.vulncheck.com/advisories/netgate-pfsense-ce-2.7.0-through-2.9.0-command-injection-via-captive-portal-ha-sync
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