It's sad how smart they tried to be when adding the backdoor: "the corresponding password for this username is derived by concatenating the PBX's serial number, the string 'r2d2,' and the current date [in the format 'http://DD.MM.YYYY'], ..." https://thehackernews.com/2021/12/secret-backdoors-found-in-german-made.html?m=1Response: 1476230144595480586