Network Scanner Tool and Network Scanner Tool Lite provided by Sharp Corporation, with the initial configuration, require no authentication and accept files unlimitedly. When the affected products are used with the initial configuration, anyone can connect to them without authentication and upload files unlimitedly. This may cause a denial-of-service (DoS) condition on the PC. Furthermore, if a malicious file is uploaded, a PC user may be tricked to execute the file to attack other entities from that PC.