Chances are, the bits that made up this page you’re reading came to you via a Cisco network router (or many of them). Cisco’s routers have their own operating system, IOS. Like any software, IOS isn’t perfect. As a matter of fact, a researcher found a fairly serious flaw in IOS. But it looks like Cisco is trying to silence him. He ended up quitting his job in order to deliver a paper on the flaw at a conference.

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