---
title: "NAVTOR NavBox Hard-Coded Credentials Vulnerability: CVE-2026-21404 Explained"
short_title: "NAVTOR NavBox hard-coded credentials flaw"
description: "CVE-2026-21404 exposes NAVTOR NavBox to unauthorized access via hard-coded credentials. Learn mitigation steps and patch details to secure your systems."
author: "Vitus"
date: 2024-10-02
categories: [Cybersecurity, Vulnerabilities]
tags: [cve-2026-21404, hard-coded-credentials, navtor, soap, maritime-cybersecurity]
score: 0.65
cve_ids: [CVE-2026-21404]
---
## TL;DR
NAVTOR NavBox versions up to 4.16.1.20 contain a hard-coded credentials vulnerability (CVE-2026-21404), allowing local attackers to bypass authentication and disrupt operations. A patch (version 4.17.2.6) was released in April 2026, and users with active connections are automatically updated. No remote exploitation is possible, but the flaw poses a medium-severity risk with high attack complexity.
Main Content
### Introduction
Cybersecurity threats in critical infrastructure sectors, particularly maritime technology, continue to evolve. NAVTOR, a leading provider of navigation solutions, has addressed a significant vulnerability in its NavBox software. CVE-2026-21404 involves hard-coded credentials in the Windows Communication Foundation (SOAP) implementation, enabling local attackers to gain unauthorized access to privileged methods. This article explores the vulnerability, its impact, and recommended mitigation strategies.
### Key Points
- Vulnerability: Hard-coded credentials in NAVTOR NavBox’s SOAP interface (CVE-2026-21404).
- Affected Version: NavBox 4.16.1.20 and earlier.
- Severity: Medium (CVSS 6.3 for v3.1, 5.8 for v4.0).
- Impact: Unauthorized access to SOAP methods, potential file manipulation, and operational disruption.
- Patch Available: Version 4.17.2.6 released in April 2026; automatic updates for active connections.
- Exploitation: Requires local access and high attack complexity; no remote exploitation reported.
### Technical Details
#### Vulnerability Overview
CVE-2026-21404 stems from hard-coded credentials embedded in NAVTOR NavBox’s SOAP implementation. If the SOAP functionality is enabled, a local attacker can extract these credentials to bypass authentication. Successful exploitation grants access to privileged WCF (Windows Communication Foundation) methods, allowing the attacker to write or overwrite files within predefined application paths.
#### Attack Vector
- Access Requirement: Local access to the system running NavBox.
- Complexity: High, due to the need for specific conditions (e.g., enabled SOAP functionality).
- Impact: Unauthorized file manipulation, potential disruption of navigation operations.
#### CVSS Metrics
| CVSS Version | Base Score | Severity | Vector String |
|--------------|------------|----------|---------------------------------------------------------------------------------------------------|
| 3.1 | 6.3 | Medium | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H |
| 4.0 | 5.8 | Medium | 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 |
### Impact Assessment
#### Affected Systems
- Product: NAVTOR NavBox (versions up to 4.16.1.20).
- Sector: Maritime and Information Technology.
- Deployment: Worldwide, with headquarters in Norway.
#### Potential Consequences
- Operational Disruption: Unauthorized file modifications could disrupt navigation systems, posing risks to maritime operations.
- Data Integrity Risks: Attackers could overwrite critical files, leading to inaccurate or manipulated navigation data.
- Limited Scope: Exploitation is local-only, reducing the risk of large-scale remote attacks.
### Mitigation Steps
NAVTOR has released a patch to address this vulnerability. Users are advised to:
1. Apply the Patch:
- Update to NavBox version 4.17.2.6 or later. Active connections receive automatic updates.
- Verify the update status through the official NAVTOR support channel.
2. Network Security:
- Minimize network exposure for control system devices. Ensure they are not accessible from the internet.
- Isolate control systems behind firewalls and separate them from business networks.
3. Remote Access Best Practices:
- Use secure methods like Virtual Private Networks (VPNs) for remote access.
- Keep VPNs updated to the latest version and ensure connected devices are secure.
4. Monitor for Malicious Activity:
- Implement intrusion detection systems to monitor for suspicious activity.
- Follow CISA’s recommended practices for control systems security (CISA ICS webpage).
5. Social Engineering Awareness:
- Train staff to recognize phishing and social engineering attacks.
- Avoid clicking on unsolicited links or opening attachments from unknown sources.
## Conclusion
CVE-2026-21404 highlights the risks posed by hard-coded credentials in critical maritime navigation systems. While the vulnerability requires local access and has a high attack complexity, its potential impact on operations underscores the need for prompt patching and robust cybersecurity measures. NAVTOR’s automatic update mechanism simplifies remediation, but organizations must remain vigilant against evolving threats.
For further guidance, refer to CISA’s ICS security recommendations and NAVTOR’s official advisories.
## References
[^1]: CISA. "ICS Advisory (ICSA-26-155-01) - NAVTOR NavBox". Retrieved 2024-10-02.
[^2]: MITRE. "CWE-798: Use of Hard-coded Credentials". Retrieved 2024-10-02.
[^3]: CVE Details. "CVE-2026-21404". Retrieved 2024-10-02.