OS Command Injection Vulnerability in Netgate pfSense CE
CVE-2026-111217

8.6HIGH

Key Information:

Vendor

Netgate

Status
Pfsense Ce
Vendor
CVE Published:
15 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-111217?

Netgate pfSense CE, through version 2.9.0, is vulnerable to an OS command injection that can be exploited by authenticated users with Virtual IP edit privileges. This vulnerability arises from improper validation of the CARP Virtual Host Identifier (VHID). Attackers can manipulate the VHID to include shell metacharacters, which are then executed through specific functions when the CARP status is processed or when configuring interface IP alias settings. This poses a significant risk as it enables execution of arbitrary commands with root privileges.

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-2026-111217 - Proof of Concept

References

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