Do a spoofed Mac address and hacked Wep security, leave permanent loophole in wifi security in future?

tortvoice v

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Jul 16, 2014
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Recently our wifi (with Wep security) was hacked and MAC address spoofed. So I am going upgrade to the WPA2-AES encryption. My question is, in future will an already spoofed Mac address be still a loophole with WPA2-AES security upgrade?

I am aware that I've been living under rock for still using wep in 2017.