This indicates an attack attempt to exploit an Information Disclosure Vulnerability in dataTaker DT80.
The vulnerability is due to improper authentication in the application when handling HTTP requests. A remote attacker can exploit this to access sensitive information, such as admin credentials, on the affected devices.
dataTaker DT80 dEX 1.50.012 and earlier
Information Disclosure: Remote attackers can gain sensitive information from vulnerable systems
Currently, we are unaware of any vendor supplied patch for this issue.