this are not my routers, so i wouldn't check, but as i see in your post - they have old ROS. In 6.42.1 was fix for vulnerability in winbox yah not work with 6.42.1 you are right after my post someone shear this post viewtopic.php?t=133533 and talks about this bug That's great work from Mikrotik to ...

public ip 80.249.83.171 opean port www and winbox 8291 sir Starting Nmap ( https://nmap.org ) at 2018-06-09 04:16 UTC NSE: Loaded 40 scripts for scanning. Initiating Ping Scan at 04:16 Scanning 80.249.83.171 [4 ports] Completed Ping Scan at 04:16, 0.22s elapsed (1 total hosts) Initiating SYN Stealt...

public ip 80.249.83.171 opean port www and winbox 8291 sir Starting Nmap ( https://nmap.org ) at 2018-06-09 04:16 UTC NSE: Loaded 40 scripts for scanning. Initiating Ping Scan at 04:16 Scanning 80.249.83.171 [4 ports] Completed Ping Scan at 04:16, 0.22s elapsed (1 total hosts) Initiating SYN Stealt...

public ip 80.249.83.171 opean port www and winbox 8291 sir Starting Nmap ( https://nmap.org ) at 2018-06-09 04:16 UTC NSE: Loaded 40 scripts for scanning. Initiating Ping Scan at 04:16 Scanning 80.249.83.171 [4 ports] Completed Ping Scan at 04:16, 0.22s elapsed (1 total hosts) Initiating SYN Stealt...

public ip 80.249.83.171

opean port www and winbox 8291 sir

Probably related to this (known) topic: viewtopic.php?t=133533

But, if you think you found a new bug, please contact support directly with instructions and supout.

ya seems like this but using port 80
and should to change the winbox port 8291

116.15.139.78 mikrotik with public IP

at last open one port !!

Please contact us at support@mikrotik.com with descriptions

i did that and i hope them replay as soon as they can

Those routers have two admin accounts with full rights, and it's even easier, because you can see their names using the password-less "admin" account. It's two MikroTik's own demo routers, with supposedly secure RouterOS. And to be honest, I'm a little skeptic that you can get in (as full admin). B...

Anyone who wants the username and password of his Mikrotik System , only send me your cloud ip or host name and i will give you it , no matter how long and complicated it is

Go for it:
demo.mt.lv
demo2.mt.lv

username : admin
password :empty

What version of OS are you using?
What external access is permitted to your router?
What internal access is permitted to your router?

any version and so log from external or internal you just need to connect to the network and you can get that username and password for that system .

Maybe instead of bragging, you could inform Mikrotik about the issue so it could be solved?
Write a mail to support, open a ticket, describe the issue in detail, provide hacking means, methods and descriptions to them. This is not solvable in an user forum.

thanks i did it

Chill out, man!
Just set only some ip addresses for access and you are done.

as i told you i can get your username and password for your mikrotik in 3 second

normis We are facing a serious issue, there is big bug in the Mikrotik system that will destroy it, which will stop our business, and SOLUTIONS must be found, hoping the R&D fix it immediately, and anyone has any idea how to solve it please contact me. Meanwhile, Anyone who wants the username and pa...

Hello Everyone, We are facing a serious bug , there is big bug in the microtik system that will destroy it, which will stop our business, and SOLUTIONS must be found, hoping the R&D fix it immediately, and anyone has any idea how to solve it please contact me. Meanwhile, Anyone who wants the usernam...