OS Command Injection Vulnerability in Netgate pfSense CE Product
CVE-2026-111218

8.6HIGH

Key Information:

Vendor

Netgate

Status
Pfsense Ce
Vendor
CVE Published:
15 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-111218?

Netgate pfSense CE versions 2.7.0 through 2.9.0 are susceptible to an OS command injection flaw that can be exploited by authenticated users who have Traffic Shaper Limiters privileges. This vulnerability allows attackers to execute root commands by manipulating the limiter number field. Specifically, by submitting a concealed 'number' value when modifying a limiter and subsequently removing it, the system can inadvertently pass an unquoted value to dnctl through /bin/sh with root permissions. This flaw poses serious risks as it opens pathways for unauthorized command execution.

Affected Version(s)

pfSense CE 2.7.0 <= 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-2026-111218 - Proof of Concept

References

https://github.com/abraxas/pfsense-limiter-number
exploittechnical-description
https://abraxaslabs.tech/research/pfsense-ce-leftovers
technical-description
https://abraxaslabs.tech/research/pfsense-limiter-number
technical-description

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Abraxas Labs
.