PatchTheCVECVE-2026-111221: Netgate pfSense CE through 2.9.0 contains a configuration injection vulnerability that allows authenticated We
CVE-2026-111221 is a medium-severity flaw (CVSS 6.6) affecting pfsense. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.6 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | High |
| Privileges needed | High |
| User interaction | None |
| EPSS exploit chance | 0.9% (top 39%) |
| CISA exploited list | No |
| Weakness | CWE-93 |
| Published | 2026-10-15 |
| Last modified | 2026-10-26 |
Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-111221?
pfsense: upgrade to newer than 2.9.0. Exact commands for each OS are on this page.
Is CVE-2026-111221 being exploited?
CVE-2026-111221 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-111221 affect?
CVE-2026-111221 affects pfsense. Severity is medium (CVSS 6.6). 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 privi
How urgent is CVE-2026-111221?
Priority 38/100. No elevated risk signals yet.
Software pages
PHP vulnerabilities · pfSense and OPNsense vulnerabilities
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