# CVE-2025-11730: Command injection in ATP series firmware

> Authenticated administrators can execute arbitrary OS commands via crafted CLI arguments in Zyxel firewall firmware.

- **Severity:** High 7.2 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 Feb 2026
- **Updated:** 26 Feb 2026
- **Also known as:** GHSA-vjp6-rfgp-h63q

## What is CVE-2025-11730?

CVE-2025-11730 is a high-severity command injection vulnerability in Zyxel ATP series firmware, published on 5 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A post‑authentication command injection vulnerability in the Dynamic DNS (DDNS) configuration CLI command in Zyxel ATP series firmware versions from V5.35 through V5.41, USG FLEX series firmware versions from V5.35 through V5.41, USG FLEX 50(W) series firmware versions from V5.35 through V5.41, and USG20(W)-VPN series firmware versions from V5.35 through V5.41 could allow an authenticated attacker with administrator privileges to execute operating system (OS) commands on an affected device by supplying a specially crafted string as an argument to the CLI command.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2025-11730?


## How do I fix CVE-2025-11730?

No fix has been published for CVE-2025-11730 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-11730 being exploited?

There is no known exploitation of CVE-2025-11730 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-11730 and fix it if it is affected.

What it is: CVE-2025-11730 is a high-severity command injection vulnerability in Zyxel ATP series firmware, published on 5 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-11730 in the wild and no public exploit code.

Affected product: Zyxel ATP series firmware. 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-2025-11730/ (Markdown: https://insights.sbomify.com/CVE-2025-11730/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-11730
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-11730
- OSV: https://osv.dev/vulnerability/CVE-2025-11730

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-11730/
Summaries are generated and may contain mistakes; the official description above is the record.