# CVE-2025-9133: Missing authorization in ATP series firmware

> A semi-authenticated attacker can bypass full two-factor authentication to view and download system configuration from affected Zyxel firewalls.

- **Severity:** High 8.1 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Oct 2025
- **Updated:** 26 Feb 2026
- **Also known as:** GHSA-x59x-qc82-4w4p

## What is CVE-2025-9133?

CVE-2025-9133 is a high-severity missing authorization vulnerability in Zyxel ATP series firmware, published on 21 Oct 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A missing authorization vulnerability in Zyxel ATP series firmware versions from V4.32 through V5.40, USG FLEX series firmware versions from V4.50 through V5.40, USG FLEX 50(W) series firmware versions from V4.16 through V5.40, and USG20(W)-VPN series firmware versions from V4.16 through V5.40 could allow a semi-authenticated attacker—who has completed only the first stage of the two-factor authentication (2FA) process—to view and download the system configuration from an affected device.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2025-9133?

It affects 1 product.


Products: Zyxel Zld.

## How do I fix CVE-2025-9133?

No fix has been published for CVE-2025-9133 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-9133 being exploited?

There is no known exploitation of CVE-2025-9133 in the wild and no public exploit code.

## Other vulnerabilities in Zyxel ATP series firmware

- [CVE-2024-11667](https://insights.sbomify.com/CVE-2024-11667/): Zyxel Multiple Firewalls Path Traversal (high 7.5, exploited in the wild)
- [CVE-2024-42057](https://insights.sbomify.com/CVE-2024-42057/): Command injection in ATP series firmware (high 8.1)
- [CVE-2024-42058](https://insights.sbomify.com/CVE-2024-42058/): Null dereference in ATP series firmware (high 7.5)
- [CVE-2023-4398](https://insights.sbomify.com/CVE-2023-4398/): Integer overflow in ATP series firmware (high 7.5)
- [CVE-2025-8078](https://insights.sbomify.com/CVE-2025-8078/): Command injection in ATP series firmware (high 7.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-9133 and fix it if it is affected.

What it is: CVE-2025-9133 is a high-severity missing authorization vulnerability in Zyxel ATP series firmware, published on 21 Oct 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-9133 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-2025-9133/ (Markdown: https://insights.sbomify.com/CVE-2025-9133/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-9133
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-9133
- OSV: https://osv.dev/vulnerability/CVE-2025-9133

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-9133/
Summaries are generated and may contain mistakes; the official description above is the record.