CVE-2026-2752 Overview
CVE-2026-2752 is an information disclosure vulnerability affecting Navtor NavBox. A remote, unauthenticated attacker can send crafted requests to the /api/ais-data endpoint to trigger an unhandled exception, causing the server to return verbose .NET stack traces. These error messages expose internal class names, method calls, and third-party library references (e.g., System.Data.SQLite), which may assist attackers in mapping the application's internal structure and planning further attacks.
Critical Impact
Unauthenticated attackers can extract sensitive application internals including .NET class names, method signatures, and third-party library information through verbose error messages, facilitating reconnaissance for subsequent attacks.
Affected Products
- Navtor NavBox version 4.12.0.3
Discovery Timeline
- 2026-03-06 - CVE CVE-2026-2752 published to NVD
- 2026-03-10 - Last updated in NVD database
Technical Details for CVE-2026-2752
Vulnerability Analysis
This vulnerability is classified as CWE-209 (Generation of Error Message Containing Sensitive Information). The flaw exists in the error handling mechanism of the Navtor NavBox /api/ais-data endpoint. When the application encounters unexpected or malformed input, it fails to properly sanitize exception information before returning it to the client. Instead of presenting a generic error message, the server exposes full .NET stack traces containing detailed internal information.
The disclosed information includes internal class names and namespaces, method call hierarchies, references to third-party libraries such as System.Data.SQLite, and potentially file paths and line numbers from the application's source code structure. This type of information disclosure is particularly valuable to attackers during the reconnaissance phase, as it reveals the application's architecture and potential attack surfaces.
Root Cause
The root cause is improper exception handling in the /api/ais-data endpoint. The application lacks proper error sanitization, allowing raw .NET exception details to be returned in HTTP responses when unhandled exceptions occur. This is a common misconfiguration in .NET applications where debug-level error messages are inadvertently exposed in production environments.
Attack Vector
The attack vector is network-based and requires no authentication. An attacker can exploit this vulnerability by sending specially crafted HTTP requests to the /api/ais-data endpoint. By manipulating request parameters or sending malformed data, the attacker can trigger unhandled exceptions that cause the server to return verbose error messages containing sensitive application details.
The exploitation is straightforward: an attacker sends malformed requests to the vulnerable endpoint and analyzes the returned stack traces to understand the internal application structure, identify potential weaknesses, and gather intelligence for more targeted attacks.
Detection Methods for CVE-2026-2752
Indicators of Compromise
- HTTP responses from the /api/ais-data endpoint containing .NET stack trace patterns such as at System. or Exception:
- Error responses revealing internal class names, method signatures, or file paths
- Unusual volume of requests to the /api/ais-data endpoint from a single source
- HTTP 500 Internal Server Error responses containing verbose debugging information
Detection Strategies
- Monitor web server logs for requests to /api/ais-data that result in HTTP 500 responses
- Implement response body inspection rules to detect .NET stack trace patterns in outbound traffic
- Configure web application firewalls to alert on responses containing sensitive error information such as exception stack traces or internal path disclosures
- Deploy SentinelOne Singularity for endpoint visibility to detect reconnaissance activities and suspicious API probing behavior
Monitoring Recommendations
- Enable detailed logging for the NavBox application's API endpoints to track unusual request patterns
- Configure alerts for HTTP responses containing exception-related keywords such as System.Data.SQLite, StackTrace, or Exception
- Monitor for sequential probing requests targeting the /api/ais-data endpoint with varying payloads
How to Mitigate CVE-2026-2752
Immediate Actions Required
- Apply vendor-provided patches or updates for Navtor NavBox as referenced in the Navtor Vendor Statement
- Configure the application to suppress detailed error messages in production environments
- Implement authentication requirements for the /api/ais-data endpoint if not already in place
- Deploy web application firewall rules to filter responses containing verbose error information
Patch Information
Consult the Navtor Vendor Statement for official patch information and remediation guidance. Additional technical details are available in the Cydome Vulnerability Advisory CVE-2026-2752.
Workarounds
- Configure custom error pages in the .NET application configuration to prevent stack traces from being returned to clients
- Implement a reverse proxy or web application firewall to sanitize error responses before they reach clients
- Restrict network access to the /api/ais-data endpoint to trusted IP ranges only
- Enable request validation and input sanitization at the API gateway level to reduce the likelihood of triggering unhandled exceptions
# Example: .NET web.config configuration to disable detailed errors
# Add to system.web section in web.config
# <customErrors mode="On" defaultRedirect="~/Error">
# <error statusCode="500" redirect="~/Error/InternalError" />
# </customErrors>
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
