CVE-2026-111221 is a vulnerability in Netgate Pfsense
Published on October 15, 2026
Netgate pfSense CE through 2.9.0 Command Injection via RADIUS Secret mpd.conf Injection
Netgate pfSense CE through 2.9.0 contains a configuration injection vulnerability that allows authenticated WebGUI users to inject mpd5 commands by submitting an unescaped RADIUS shared secret. Attackers with L2TP or PPPoE Server edit privileges can POST a secret containing a quote and newline to vpn_l2tp.php or services_pppoe_edit.php, appending an up-script that executes as root when a session starts.
Vulnerability Analysis
CVE-2026-111221 can be exploited with network access, and requires user privileges. This vulnerability is consided to have a high level of attack complexity. Public availability of a proof of concept (POC) exploit exists for CVE-2026-111221. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is a CRLF Injection Vulnerability?
The software uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs.
CVE-2026-111221 has been classified to as a CRLF Injection vulnerability or weakness.
Products Associated with CVE-2026-111221
Want to know whenever a new CVE is published for Netgate Pfsense? stack.watch will email you.
Affected Versions
Netgate pfSense CE:- Before and including 2.9.0 is affected.