# CVE-2026-111221: Netgate pfSense CE through 2.9.0 Command Injection via RADIUS Secret mpd.conf Injection

> Authenticated users can inject commands into RADIUS secrets to execute arbitrary code as root on pfSense CE firewalls.

- **Severity:** High 7.5 (`CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 Oct 2026
- **Updated:** 26 Oct 2026
- **Also known as:** GHSA-28v9-q2x4-wjw8

## What is CVE-2026-111221?

CVE-2026-111221 is a high-severity command injection vulnerability in Netgate pfSense CE, published on 15 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

Netgate pfSense CE through 2.9.0 contains a configuration injection vulnerability that allows authenticated WebGUI users to inject mpd5 commands by submitting an unescaped RADIUS shared secret. Attackers with L2TP or PPPoE Server edit privileges can POST a secret containing a quote and newline to vpn_l2tp.php or services_pppoe_edit.php, appending an up-script that executes as root when a session starts.

Weakness: CWE-93 (Improper Neutralization of CRLF Sequences)

## Which versions are affected by CVE-2026-111221?

It affects 1 product.


Products: Pfsense Pfsense.

## How do I fix CVE-2026-111221?

No fix has been published for CVE-2026-111221 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-111221 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111221 exists.

## Other vulnerabilities in Netgate pfSense CE

- [CVE-2025-69691](https://insights.sbomify.com/CVE-2025-69691/): Code injection in n/a (critical 9.9)
- [CVE-2023-29974](https://insights.sbomify.com/CVE-2023-29974/): Weak cryptography in n/a (critical 9.8)
- [CVE-2025-69690](https://insights.sbomify.com/CVE-2025-69690/): Deserialization in n/a (critical 9.1)
- [CVE-2021-41282](https://insights.sbomify.com/CVE-2021-41282/): Code injection in n/a (high 8.8)
- [CVE-2016-10709](https://insights.sbomify.com/CVE-2016-10709/): Command injection in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-111221 and fix it if it is affected.

What it is: CVE-2026-111221 is a high-severity command injection vulnerability in Netgate pfSense CE, published on 15 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111221 exists.

Affected product: Netgate pfSense CE. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-111221/ (Markdown: https://insights.sbomify.com/CVE-2026-111221/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-111221
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-111221
- OSV: https://osv.dev/vulnerability/CVE-2026-111221

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-111221/
Summaries are generated and may contain mistakes; the official description above is the record.