U.S. authorities are investigating cyber incidents involving at least two foreign-flagged tankers bound for American shores. On Aug. 21, Coast Guard law-enforcement personnel, a vessel inspector, Coast Guard Cyber Protection Team members and FBI Cyber Action Team operators boarded a Texas-bound commercial tanker before it reached port after detecting indications that its network may have been compromised by a foreign actor while crossing the Atlantic. The team examined the vessel's operational technology and information-technology systems and worked with the crew and corporate operators to remove the threat. The Coast Guard said there were no reported operational disruptions, vessel instability, physical danger to crews or environmental impacts. The agency did not identify the ship; Iranian reports appear to refer to the VL Prosperity, a 333-meter Liberian-flagged very large crude carrier capable of carrying roughly 2.3 million barrels of oil and publicly listed as bound for Galveston, Texas. Iran's Mehr and Tasnim news agencies reported alleged system interference, including a 30-hour communications loss and possible access to propulsion, navigation and cargo systems, but the United States has not attributed the potential breach to a specific actor or confirmed its extent. The incident highlights the security risks created by internet-connected operational technology aboard modern oil tankers, while the status of the broader investigation involving at least two vessels remains under review.