A mysterious grey-hat is patching people's outdated MikroTik routers

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A Russian-speaking grey-hat hacker is breaking into people’s MikroTik routers and patching devices so they can’t be abused by cryptojackers, botnet herders, or other cyber-criminals, ZDNet has learned.

The hacker, who goes by the name of Alexey and says he works as a server administrator, claims to have disinfected over 100,000 MikroTik routers already.

Alexey has not been trying to hide his actions and has boasted about his hobby on a Russian blogging platform. He says he accesses routers and makes changes to their settings to prevent further abuse.

“I added firewall rules that blocked access to the router from outside the local network,” Alexey said. “In the comments, I wrote information about the vulnerability and left the address of

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