Configuration Injection Vulnerability in Netgate pfSense CE
CVE-2026-111223

8.6HIGH

Key Information:

Vendor

Netgate

Status
Pfsense Ce
Vendor
CVE Published:
15 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-111223?

Netgate pfSense CE versions 2.7.0 through 2.9.0 are impacted by a configuration injection vulnerability. This issue arises when authenticated users with IPsec Mobile privileges can manipulate the login_banner field to execute commands with root privileges. By inserting a crafted single-line banner containing a '}', an attacker can escape the unquoted strongswan.conf attribute value, allowing them to define charon.start-scripts entries that are executed as root upon restart. This vulnerability can potentially lead to unauthorized command execution on the affected system.

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-2026-111223 - Proof of Concept

References

https://github.com/abraxas/pfsense-ipsec-login-banner
exploittechnical-description
https://abraxaslabs.tech/research/pfsense-ce-leftovers
technical-description
https://abraxaslabs.tech/research/pfsense-ipsec-login-banner
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
.