Synology DiskStation Manager (DSM) is an operating system used on network storage servers (NAS) by Synology Inc. of Taiwan, China. The operating system manages data, files, photos, music, etc. A buffer overflow vulnerability exists in Synology DiskStation Manager (DSM), which stems from a buffer copy in the Authentication function that does not check the input size. An attacker could exploit this vulnerability to execute arbitrary code with the help of unknown vectors.