# CVE-2025-2921: Netis WF-2404 passwd default password

> Attackers with physical access can use a default password to gain administrative control of the Netis WF-2404 router.

- **Severity:** Medium 5.4 (`CVSS:4.0/AV:P/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 28 Mar 2025
- **Updated:** 28 Mar 2025
- **Also known as:** GHSA-rrmq-292q-2ghp

## What is CVE-2025-2921?

CVE-2025-2921 is a medium-severity vulnerability in Netis WF-2404, published on 28 Mar 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability classified as critical has been found in Netis WF-2404 1.1.124EN. Affected is an unknown function of the file /etc/passwd. The manipulation with the input Realtek leads to use of default password. It is possible to launch the attack on the physical device. The complexity of an attack is rather high. The exploitability is told to be difficult. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-1393 (Use of Default Password)

## Which versions are affected by CVE-2025-2921?

It affects 1 product.


Products: Netis-Systems Netis Wf-2404 Firmware.

## How do I fix CVE-2025-2921?

No fix has been published for CVE-2025-2921 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-2921 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-2921 exists.

## Other vulnerabilities in Netis WF-2404

- [CVE-2025-2919](https://insights.sbomify.com/CVE-2025-2919/): Netis WF-2404 UART hardware allows activation of test or debug logic at runtime (high 7.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-2921 and fix it if it is affected.

What it is: CVE-2025-2921 is a medium-severity vulnerability in Netis WF-2404, published on 28 Mar 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-2921 exists.

Affected product: Netis WF-2404. 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-2025-2921/ (Markdown: https://insights.sbomify.com/CVE-2025-2921/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-2921
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-2921
- OSV: https://osv.dev/vulnerability/CVE-2025-2921

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-2921/
Summaries are generated and may contain mistakes; the official description above is the record.