Crontab Injection Vulnerability in pfSense CE by Netgate
CVE-2026-111220

8.6HIGH

Key Information:

Vendor

Netgate

Status
Pfsense Ce
Vendor
CVE Published:
15 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-111220?

The pfSense CE software, through version 2.9.0, is vulnerable to a crontab injection attack via the interfaces_ppps_edit.php script. This vulnerability allows authenticated users, particularly those with 'WebCfg - Interfaces: PPPs: Edit' privileges, to manipulate command execution as root. By injecting newlines into specific fields, such as ptpid or reset hour/minute, a malicious actor can alter the crontab file. This manipulation enables the execution of arbitrary commands on a scheduled basis, potentially leading to significant security breaches. It is crucial for users of pfSense CE to review their configurations and apply patches to mitigate this risk.

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-2026-111220 - Proof of Concept

References

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