Apple has issued “critical” security patches for iPhone, iPad and Mac users after reports emerged of a dangerous WiFi security threat.

USA Today reports iOS and MacOS devices are vulnerable to Broadpwn, where hackers could compromise users through a bug within Broadcom’s Wi-Fi chipsets.

Security researcher Nitay Artenstein of Exodus Intelligence exposed the flow, which allows hackers to “execute arbitrary code on the Wi-Fi chip” if within range.

In other words, Fortune says hackers could take over your device via WiFi chips embedded in the device’s main processor.

The National Vulnerability Database, part of the National Institute of Standards and Technology, gave Broadpwn a severity score of 9.8 out of 10, or “critical.”

Apple issued a fix over the weekend. iPhone, iPad and Mac computer users are urged to download the latest updates as soon as possible to protect their security.

For iPhones, iPads and other mobile devices, users should download the latest iOS update. Go to Settings, General and then Software Update to install iOS 10.3.3.

For Mac, users should click the Updates tab within the Mac App Store and install the macOS Sierra update to version 10.12.6.

Google had a similar vulnerability to Broadpwn and issued its own security patch for Android devoices earlier this month.