Command Injection Vulnerability in Netgate pfSense CE Product
CVE-2026-111219

7.5HIGH

Key Information:

Vendor

Netgate

Status
Pfsense Ce
Vendor
CVE Published:
15 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-111219?

Netgate pfSense CE through version 2.9.0 is affected by a newline injection vulnerability present in the services_pppoe_edit.php script. This flaw enables attackers with the necessary PPPoE Server Edit permissions to insert malicious mpd.secret entries. By crafting unvalidated username POST fields, an attacker can trigger mpd5 to execute commands as root when a PPPoE client attempts authentication. This vulnerability poses a significant risk, enabling unauthorized command execution on the affected systems.

Affected Version(s)

pfSense CE 0 <= 2.9.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-111219 - Proof of Concept

References

https://github.com/abraxas/pfsense-pppoe-secret-bang
exploittechnical-description
https://abraxaslabs.tech/research/pfsense-ce-leftovers
technical-description
https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a...
technical-description

CVSS V4

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Abraxas Labs
.