Three vulnerabilities known as "Trident" could be exploited to allow an attacker to gain full control of iOS devices. Spyware called Pegasus is known to take advantage of these holes. Researchers say Pegasus is unlikely to be on the vast majority of devices. However, since the flaws are now public, attackers could use those holes to wreak havoc. Apple's iOS 9.5.3 update should make iPhones and iPads secure against Trident.
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