Siemens SIMATIC S7-300 incl. F and T (All versions before V3.X.14), SIMATIC S7-400 incl. F and H (All versions), SIMATIC HMI Comfort Panels, HMI Multi Panels, HMI Mobile Panels (All versions) could be affected by a Denial-of-Service condition induced by a specially crafted PROFINET DCP (Layer 2 – Ethernet) packet sent to an affected product.