iOS 7.0.2 was released by Apple on Thursday, and is available to download and install now for all devices that can run iOS 7. Apple says that the update: "Fixes bugs that could allow someone to bypass the Lock screen passcode."
Apple has also reintroduced the Greek keyboard option for passcode entry.
iOS 7.0.1 came out last week but was specifically for iPhone 5c and iPhone 5s.
iOS 7 was released on 18 September, and shortly after, it was discovered that there was a way to bypass the lock screen and access Contacts, Photos, Twitter and Voicemail. It was a tricky process, involving speedy input, but it was doable nonetheless.
Apple confirmed that it was working on a fix for the security flaw, and has delivered with iOS 7.0.2.
Apple has said that more than 200 million iOS devices were running iOS 7 within five days of its release.