Vulnerability · Published Oct 15, 2026 · Assigned by VulnCheck
CVE-2026-111219Netgate pfSense CE through 2.9.0 Command Injection via PPPoE Server Username
Medium 6.6
In plain English
A medium-severity security flaw 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 0.9% (higher than 59% of all known vulnerabilities).
Severity (CVSS 3.1)6.6Medium
Exploit odds (30 days)0.9%top 41.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
Netgate pfSense CE through 2.9.0 contains a newline injection vulnerability in services_pppoe_edit.php that allows privileged users to inject mpd.secret entries via unvalidated username POST fields. Attackers with the PPPoE Server Edit privilege can add a line whose secret begins with '!', making mpd5 run commands as root when a PPPoE client authenticates.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Netgate | pfSense CE | 0 – through 2.9.0 |
Weakness: CWE-93 · Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
References
- https://github.com/abraxas/pfsense-pppoe-secret-bang exploit, technical-description
- https://abraxaslabs.tech/research/pfsense-ce-leftovers technical-description
- https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/vpn.inc#L272-L282 technical-description
- https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/usr/local/www/services_pppoe_edit.php#L141-L152 technical-description
- VulnCheck Advisory: Netgate pfSense CE through 2.9.0 Command Injection via PPPoE Server Username third-party-advisory