A major security flaw could put any WiFi-connected device at risk.

A vulnerability in the WPA2 protocol, which secures WiFi networks, exposes “just about every router, smartphone and PC out there” to hackers who can steal credit card numbers, passwords, emails or other forms of sensitive data. Belgian researcher Mathy Vanhoef discovered the flaws, called Key Reinstallation Attacks (“Krack Attacks”), and says it could be particularly damaging for a certain Linux version and devices using Android 6.0 and above — half the Android devices in circulation.

A silver lining: Hackers have to be within close physical proximity to take advantage of the vulnerability. Vanhoef says you don’t need to change your WiFi password, but do make sure your devices and routers are updated. • Share your thoughts: #KrackAttack

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