An Authentication Bypass vulnerability exists in upnp/asf-mp4.asf when streaming live video in D-Link TESCO DCS-2121 1.05_TESCO, TESCO DCS-2102 1.05_TESCO, DCS-2121 1.06_FR, 1.06, and 1.05_RU, DCS-2102 1.06_FR. 1.06, and 1.05_RU, which could let a malicious user obtain sensitive information.