CVE-2026-42929 affects Danelec MacGregor Voyage Data Recorder systems which include default accounts with hard-coded credentials. This vulnerability allows unauthorized access to maritime voyage data recording systems through the use of default authentication credentials that are built into the product. The issue represents a significant security risk for maritime operations as these systems record critical navigation and operational data. CISA has issued an advisory (ICSA-26-148-01) addressing this vulnerability. The vulnerability impacts critical maritime infrastructure used for compliance and safety purposes.