Watch Your Connection! Millions of Wi-Fi Users Exposed to Hacker Attacks

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Every network-capable device has a hard-coded, unique "media access control" or MAC address, and most Wi-Fi routers have a feature that lets you only allow access to your network for specified MAC addresses. It suggests they've known about it for some time.

A major flaw has been discovered in a security protocol called WPA2 that protects most Wi-Fi networks, Business Insider reported.

As the weakness lies in WPA2 itself, all devices using WiFi are at risk.

A security researcher by the name of Mathy Vanhoef has discovered serious vulnerabilities in WPA2, a protocol that secures all modern protected Wi-Fi networks.

Initial research found Android, Linux, Apple, Windows, Linksys and others are all affected by some variant of the attacks. The attacker can use this technique to read information that was previously assumed to be safely encrypted. What follows is a short rundown on what exactly is at stake here, who's most at-risk from this vulnerability, and what organizations and individuals can do about it.

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Manufacturers and vendors have promised updates that are already available or will be soon. Microsoft says it has already issued an update.

Microsoft, which publishes first update on operating system side, states that re is no way to be feared on computers that are receiving automatic updates. Google says it'll do so in the coming weeks. The hacker only needs to be within range of your Wi-Fi-not logged into your network-to take advantage of it and steal your data. This also means that any attack being mounted is limited to that particular Wi-Fi network. And you can watch the video above for additional information.

An easy way to tell whether you're on a secure site is to look for "https" at the beginning of the URL, or to look for a padlock icon in the URL bar. However, considering the fact that any and all connecting devices must be considered vulnerable, the potential of hackers getting their hands on sensitive data from devices is very true, particularly on public Wi-Fi networks. "Users can expect all their Wi-Fi devices, whether patched or unpatched, to continue working well together", the statement said.

This is probably overkill, especially if you follow the other three steps listed above.

"Wi-Fi Alliance now requires testing for this vulnerability within our global certification lab network and has provided a vulnerability detection tool for use by any Wi-Fi Alliance member".