CVE-2026-111221 Netgate pfSense CE through 2.9.0 Command Injection via RADIUS Secret mpd.conf Injection
Authenticated users can inject commands into RADIUS secrets to execute arbitrary code as root on pfSense CE firewalls.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-111221?
CVE-2026-111221 is a high-severity command injection vulnerability in Netgate pfSense CE, published on 15 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
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.
Weakness: CWE-93
Which versions are affected by CVE-2026-111221?
It affects 1 product.
Products include Pfsense Pfsense.
How do I fix CVE-2026-111221?
No fix has been published for CVE-2026-111221 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-111221 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111221 exists.
Other vulnerabilities in Netgate pfSense CE
Sources
Also known as GHSA-28v9-q2x4-wjw8.