Hello. I have in Moscow two of your security cameras. I myself am in Vietnam. R

[yapyap]

Hello. I have in Moscow two of your security cameras. I myself am in Vietnam. Recently, your program has requested an update. I had to agree. After the upgrade, both cameras began to require a password from me. But I did not enter any password. What password should I enter? Or what to do to make the cameras work as before without a password?