Certain Anpviz products allow unauthenticated users to download arbitrary files from the device's filesystem via a HTTP GET request to the /playback/ URI. This affects IPC-D250, IPC-D260, IPC-B850, IPC-D850, IPC-D350, IPC-D3150, IPC-D4250, IPC-D380, IPC-D880, IPC-D280, IPC-D...