NCCIC/ICS-CERT is responding to a campaign of activity affecting maritime transportation sector members. This report is intended to provide awareness to the US Critical Infrastructure community and make available Indicators of Compromise (IOCs) and mitigation recommendations. ICS-CERT is aware of a public report of SQL Injection vulnerability with proof-of-concept (PoC) exploit code affecting the Navis WebAccess application. This vulnerability has been exploited against multiple U.S.-based organizations, resulting in data loss.