Hackers have just given iPhone and iPad users a big reason to upgrade to iOS 9 due out later today: it fixes a serious AirDrop security vulnerability.

Mark Dowd, an Australian security researcher with Azimuth Security, revealed this morning that iOS 8.4.1 contains a critic security flaw in AirDrop that could allow an attacker to install malware on any device within range. Worst of all, even if a victim tried to reject the incoming AirDrop file, the bug lets attackers tweak the iOS settings so the exploit will still work.

Check out the lethal bug in action:

A London woman has reported being the victim of “cyber-flashing” after receiving two photos of a man’s genitals on her iPhone via AirDrop.

AirDrop on iOS makes it easier to share images and other files with the people around you than ever before, but it’s also a great way to troll innocent bystanders with space sloths. But there’s a way to protect yourself.

When you need to move files quickly between two Apple devices, AirDrop is an incredibly useful tool. It started out as a Mac-to-Mac thing, and then iPhone-to-iPhone, but with iOS 8 and OS X Yosemite, AirDrop becomes even more powerful: Now you can share files from Mac to iPhone (or iPad) and vice versa.

Here’s how.

When you travel with a Mac laptop, whether a Macbook Pro or Air, you may be leaving it open to malicious users to get into your machine.

One of the things you can do to keep them out of your precious files is to turn off File Sharing completely. Then, if you still want to share files with other Mac users, you can use AirDrop, which is more of a temporary opening of the security gates than File Sharing is.

Note that you can indeed improve security while using File Sharing on and setting up your Firewall with specific ports, but that’s the subject of a different tip.

Let’s say you’re at a conference, and you meet someone you’d like to share your contact information with. You could both download one of many apps in the App Store for this express purpose, you can hand them a business card, or you can just use the simplest solution: send them an email or text message with your contact info.

It’s super easy to do, and takes way less time than downloading an app. It’s also more efficient than a business card, since you know no one actually keeps those, right?

In OS X Mountain Lion, Apple made sharing files between two Macs easier than ever before with AirDrop… but that only works if you’re on the same network. What if you want something as easy to use as AirDrop, but with people outside the range of your Time Capsule?

Enter Infinit, a slick new Mac file-sharing app that makes it effortless to send files to anyone, even if their computer is turned off.