Wired reported about a “Russian espionage campaign has used those Wi-Fi networks to spy on high-value hotel guests, and recently started using a leaked NSA hacking tool to upgrade their attacks.” Wired’s August 11, 2017 report was entitled “Russia’s ‘Fancy Bear’ Hackers Used Leaked NSA Tool to Target Hotel Guests” which included FireEye’s report that:

…it first saw evidence that Fancy Bear might be targeting hotels in the fall of last year, when the company analyzed an intrusion that had started on one corporate employee’s computer.

The company traced that infection to the victim’s use of a hotel Wi-Fi network while traveling; 12 hours after the person had connected to that network, someone connected to the same Wi-Fi network had used the victim’s own credentials to log into their computer, install malware on their machine, and access their Outlook data.

That implies, FireEye says, that a hacker had been sitting on the same hotel’s network, possibly sniffing its data to intercept the victim’s credentials.

Maybe you should avoid hotel wifi!!!!