# CVE-2026-0711: Command injection in DX3300-T0 firmware

> Authenticated administrators can execute arbitrary OS commands on Zyxel DX3300-T0 devices via EasyMesh APIs.

- **Severity:** Medium 6.8 (`CVSS:3.1/AV:A/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:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 28 Apr 2026
- **Updated:** 29 Apr 2026
- **Also known as:** GHSA-8358-7fqv-7hg5

## What is CVE-2026-0711?

CVE-2026-0711 is a medium-severity command injection vulnerability in Zyxel DX3300-T0 firmware, published on 28 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A post-authentication command injection vulnerability in the EasyMesh-related APIs of Zyxel DX3300-T0 firmware versions through 5.50(ABVY.7.1)C0 could allow an authenticated, adjacent attacker with administrator privileges to execute OS commands on an affected device.

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

## Which versions are affected by CVE-2026-0711?

It affects 36 products.


Products: Zyxel Ax7501-B0 Firmware, Zyxel Ax7501-B1 Firmware, Zyxel Dx3300-T0 Firmware, Zyxel Dx3300-T1 Firmware, Zyxel Dx3301-T0 Firmware, Zyxel Dx5401-B0 Firmware, Zyxel Dx5401-B1 Firmware, Zyxel Ee3301-00 Firmware, Zyxel Ee5301-00 Firmware, Zyxel Ee6510-10 Firmware, Zyxel Emg3525-T50b Firmware, Zyxel Emg5523-T50b Firmware, Zyxel Ex3300-T0 Firmware, Zyxel Ex3300-T1 Firmware, Zyxel Ex3301-T0 Firmware, Zyxel Ex3500-T0 Firmware, Zyxel Ex3501-T0 Firmware, Zyxel Ex3600-T0 Firmware, Zyxel Ex5401-B0 Firmware, Zyxel Ex5401-B1 Firmware and 16 more.

## How do I fix CVE-2026-0711?

No fix has been published for CVE-2026-0711 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-0711 being exploited?

There is no known exploitation of CVE-2026-0711 in the wild and no public exploit code.

## Other vulnerabilities in Zyxel DX3300-T0 firmware

- [CVE-2025-8693](https://insights.sbomify.com/CVE-2025-8693/): Command injection in DX3300-T0 firmware (high 8.8)
- [CVE-2022-26413](https://insights.sbomify.com/CVE-2022-26413/): Command injection in VMG3312-T20A firmware (high 8.0)
- [CVE-2024-8748](https://insights.sbomify.com/CVE-2024-8748/): Memory corruption in VMG8825-T50K firmware (high 7.5)
- [CVE-2024-5412](https://insights.sbomify.com/CVE-2024-5412/): Memory corruption in VMG8825-T50K firmware (high 7.5)
- [CVE-2024-12009](https://insights.sbomify.com/CVE-2024-12009/): Command injection in EX5601-T1 firmware (high 7.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-0711 and fix it if it is affected.

What it is: CVE-2026-0711 is a medium-severity command injection vulnerability in Zyxel DX3300-T0 firmware, published on 28 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-0711 in the wild and no public exploit code.

Affected product: Zyxel DX3300-T0 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-2026-0711/ (Markdown: https://insights.sbomify.com/CVE-2026-0711/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-0711
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-0711
- OSV: https://osv.dev/vulnerability/CVE-2026-0711

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-0711/
Summaries are generated and may contain mistakes; the official description above is the record.