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.