Netgate pfSense CE up to 2.9.0 PPPoE services_pppoe_edit.php username injection

Summaryinfo

A vulnerability was found in Netgate pfSense CE up to 2.9.0. It has been rated as very critical. This impacts an unknown function of the file services_pppoe_edit.php of the component PPPoE. This manipulation of the argument Username causes injection. This vulnerability is tracked as CVE-2026-111219. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Netgate pfSense CE up to 2.9.0. It has been declared as very critical. Affected by this vulnerability is an unknown function of the file services_pppoe_edit.php of the component PPPoE. The manipulation of the argument username with an unknown input leads to a injection vulnerability. The CWE definition for the vulnerability is CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Netgate pfSense CE through 2.9.0 contains a newline injection vulnerability in services_pppoe_edit.php that allows privileged users to inject mpd.secret entries via unvalidated username POST fields. Attackers with the PPPoE Server Edit privilege can add a line whose secret begins with '!', making mpd5 run commands as root when a PPPoE client authenticates.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-111219 since 10/15/2026. The exploitation appears to be easy. The attack can be launched remotely. Additional levels of successful authentication are required for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/15/2026). The attack technique deployed by this issue is T1055 according to MITRE ATT&CK.

By approaching the search of inurl:services_pppoe_edit.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Firewall Software

Vendor

• Netgate

Name

• pfSense CE

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9.0

License

• open-source

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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