# CVE-2026-21404: NAVTOR NavBox Use of Hard-coded Credentials

> A local attacker can extract hard-coded credentials from the SOAP interface to bypass authentication and modify files, requiring SOAP to be enabled.

- **Severity:** Medium 5.8 (`CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 4 Jun 2026
- **Updated:** 5 Jun 2026
- **Also known as:** GHSA-x454-wfv6-72h8

## What is CVE-2026-21404?

CVE-2026-21404 is a medium-severity vulnerability in NAVTOR NavBox, published on 4 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

NAVTOR NavBox through version 4.16.1.20 contains hard-coded credentials within its Windows Communication Foundation (SOAP) implementation. If the SOAP functionality is enabled, a local attacker can extract credentials to bypass the intended transfer workflow. Successful authentication against the SOAP interface grants access to privileged WCF methods, enabling an attacker to write or overwrite files within application-defined paths.

Weakness: CWE-798 (Use of Hard-coded Credentials)

## Which versions are affected by CVE-2026-21404?

It affects 1 product.


Products: Navtor Navbox Firmware.

## How do I fix CVE-2026-21404?

No fix has been published for CVE-2026-21404 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-21404 being exploited?

There is no known exploitation of CVE-2026-21404 in the wild and no public exploit code.

## Other vulnerabilities in NAVTOR NavBox

- [CVE-2026-2753](https://insights.sbomify.com/CVE-2026-2753/): Path traversal in NavBox (high 7.5)
- [CVE-2026-2754](https://insights.sbomify.com/CVE-2026-2754/): Missing authorization in NavBox (high 7.5)
- [CVE-2026-2752](https://insights.sbomify.com/CVE-2026-2752/): Information disclosure in NavBox (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-21404 and fix it if it is affected.

What it is: CVE-2026-21404 is a medium-severity vulnerability in NAVTOR NavBox, published on 4 Jun 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-2026-21404 in the wild and no public exploit code.

Affected product: NAVTOR NavBox. 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-2026-21404/ (Markdown: https://insights.sbomify.com/CVE-2026-21404/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-21404
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-21404
- OSV: https://osv.dev/vulnerability/CVE-2026-21404

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-21404/
Summaries are generated and may contain mistakes; the official description above is the record.