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According to ITworld News (This article and its images were originally posted on ITworld News June 25, 2018 at 06:27AM.)
A zero-day is a security flaw that has not yet been patched by the vendor and can be exploited and turned into a powerful but fragile weapon. Governments discover, purchase, and use zero-days for military, intelligence and law enforcement purposes — a controversial practice, as it leaves society defenseless against other attackers who discover the same vulnerability.
Today, security mitigations in consumer operating systems like Windows 10 or Apple’s iOS mean that it is often necessary to chain together several, sometimes dozens, of minor zero-days to gain complete control of a given target. This has driven the black market payout for a remote execution zero-day in iOS to astronomical levels.
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