I normally shrug off security vulnerabilities in iOS. But so many in such a minor release?
I know it's not a valid extrapolation ... but if there are so many being fixed just today, that means there are hundreds if not thousands of still undiscovered ones remaining.
This is Microsoft's patch covering ShadowBrokers-leaked ETERNALBLUE SMB remote code execution 0day. The iOS 10.3.3 is likely the response to either the CIA Vault7 Wikileaks stash or the ShadowBrokers NSA EquationGroup stash. These exploits are probably out there in the hands of many people, and Apple had to respond.
7 x "A memory corruption issue was addressed with improved bounds checking."
Oh well....