CVE-2026-2754: Navtor NavBox Information Disclosure Flaw

CVE-2026-2754 Overview

Navtor NavBox exposes sensitive configuration and operational data due to missing authentication on HTTP API endpoints. An unauthenticated remote attacker with network access to the device can execute HTTP GET requests to TCP port 8080 to retrieve internal network parameters including ECDIS & OT Information, device identifiers, and service status logs.

This vulnerability represents a significant security concern for maritime and operational technology (OT) environments where NavBox devices are deployed for navigation data management.

Critical Impact

Unauthenticated attackers can remotely access sensitive ECDIS (Electronic Chart Display and Information System) data, internal network configurations, and operational technology parameters without any credentials, potentially enabling reconnaissance for further attacks on maritime vessel systems.

Affected Products

• Navtor NavBox (version 4.12.0-3 and potentially other versions)

Discovery Timeline

• 2026-03-06 - CVE CVE-2026-2754 published to NVD
• 2026-03-10 - Last updated in NVD database

Technical Details for CVE-2026-2754

Vulnerability Analysis

This vulnerability is classified as CWE-306: Missing Authentication for Critical Function. The Navtor NavBox device exposes HTTP API endpoints on TCP port 8080 that lack any form of authentication controls. These endpoints return sensitive configuration data, operational parameters, and system information to any requestor with network connectivity to the device.

The absence of authentication allows attackers to passively collect intelligence about the vessel's navigation systems, network architecture, and operational status. In maritime environments, this information could be leveraged for more sophisticated attacks against Electronic Chart Display and Information System (ECDIS) infrastructure or other OT components.

Root Cause

The root cause of this vulnerability is the failure to implement authentication mechanisms on the NavBox HTTP API endpoints. The device was designed to serve configuration and status information via HTTP GET requests on port 8080 without requiring any form of credential validation, session tokens, or access control checks.

This design flaw allows any network-adjacent attacker to query the API and retrieve sensitive operational data that should be restricted to authorized personnel and systems only.

Attack Vector

The attack vector for this vulnerability is network-based and requires no user interaction or prior authentication. An attacker with network access to the NavBox device's TCP port 8080 can simply issue HTTP GET requests to various API endpoints to retrieve sensitive data.

The attack can be executed remotely if the NavBox device is exposed to untrusted networks or accessible through misconfigured firewalls. In typical maritime deployments, an attacker could be on the same vessel network segment or potentially reach the device through interconnected shore-based systems.

The exploitation process involves sending standard HTTP GET requests to the NavBox API endpoints on port 8080. The device responds with sensitive configuration data including ECDIS information, OT parameters, device identifiers, and service status logs without validating the requestor's identity or authorization level. For technical details on exploitation methodology, refer to the Cydome Vulnerability Advisory.

Detection Methods for CVE-2026-2754

Indicators of Compromise

• Unusual HTTP GET requests to TCP port 8080 on NavBox devices from unauthorized IP addresses
• High volume of API queries targeting NavBox endpoints from a single source
• Network traffic logs showing external or unauthorized internal hosts communicating with NavBox devices
• Evidence of systematic enumeration of API endpoints on port 8080

Detection Strategies

• Implement network monitoring to detect HTTP traffic to port 8080 on NavBox devices from non-whitelisted sources
• Configure intrusion detection systems (IDS) to alert on reconnaissance patterns targeting NavBox API endpoints
• Review firewall logs for connection attempts to NavBox devices from unauthorized network segments
• Deploy network segmentation monitoring to identify unauthorized cross-segment communication with OT devices

Monitoring Recommendations

• Enable detailed logging on network devices between IT and OT segments to capture all traffic to NavBox devices
• Implement Security Information and Event Management (SIEM) rules to correlate NavBox access patterns with known authorized users and systems
• Establish baseline network behavior for NavBox communications and alert on deviations
• Monitor for port scanning activity targeting common maritime OT device ports including 8080

How to Mitigate CVE-2026-2754

Immediate Actions Required

• Isolate NavBox devices on a dedicated network segment with strict access controls
• Implement firewall rules to block unauthorized access to TCP port 8080 on NavBox devices
• Review and audit network access logs for any signs of prior unauthorized access to NavBox API endpoints
• Contact Navtor for updated firmware or configuration guidance addressing this vulnerability

Patch Information

Organizations should consult the Navtor Vendor Statement for official patch information and remediation guidance. Additionally, review the Cydome Vulnerability Advisory for detailed technical information about affected versions and recommended mitigations.

Workarounds

• Deploy a reverse proxy or API gateway with authentication in front of the NavBox device to enforce access controls
• Implement network-level access control lists (ACLs) restricting connectivity to port 8080 to authorized management systems only
• Consider deploying VPN or other encrypted tunnel access for legitimate remote administration of NavBox devices
• Enable host-based firewalls on systems that require NavBox connectivity to limit exposure

# Example: iptables rules to restrict NavBox API access to authorized management IP
# Replace 192.168.1.100 with your NavBox device IP
# Replace 10.0.0.50 with your authorized management station IP

iptables -A INPUT -p tcp --dport 8080 -s 10.0.0.50 -d 192.168.1.100 -j ACCEPT
iptables -A INPUT -p tcp --dport 8080 -d 192.168.1.100 -j DROP