Recent attention on high profile data breaches has overshadowed a potentially greater risk: cyber attacks on large industrial companies causing physical damage, potentially releasing contaminants, and shutting down operations. A handful of publicly reported cyber-attacks, including explosions at an oil pipeline and a steel mill, have highlighted the potential vulnerability of these companies' internet-facing industrial control systems to hackers. The insurance industry has reacted to the growing risk of privacy-related data breaches by marketing and selling so-called “cyber policies.” But these policies typically exclude coverage for property damage and are ill-suited to cover the magnitude of business interruption losses that could result from an extended shutdown of a large industrial operation. That leaves policyholders to look to their traditional property policies. This article examines the cyber-attack risk that large industrial companies face and how those companies' traditional property insurance policies may help mitigate that risk.