Apple has released an update to its iPhone, iPads and smartwatches to correct a dangerous security flaw that is being actively attacked by hackers.

The company advised users to upgrade as soon as possible to the latest version of iOS 14.4.2 (iOS 14.4.2) and iPad OS 14.4.2 (iPadOS 14.4.2), which also covers a hardware patch. It has also updated its watchOS operating system to version 7.3.3.

Apple said the vulnerability discovered by security researchers in the Google Project may have been "actively exploited" by hackers.

The bug was found in WebKit - an open source application architecture that provides the basis for building web services - and the browser engine that powers Safari on all Apple devices.

It is not known who is exploiting vulnerabilities in Apple devices, or who might be a victim.

The company did not say whether the attack targeted a small subset of users or whether it was a broader attack.

It is the third time that Apple has released a security update this year to fix flaws due to security concerns over exploiting vulnerabilities.

Earlier this month, the company released corrections to similar vulnerabilities in the Webkit.

The update immediately preceding this update also included an urgent fix for a security flaw, while the iOS 14 update was about features, not just a security update or bug fix, but the added features were relatively modest and included the camera’s ability to read QR codes. "(QR) is smaller than before, an option to manually classify Bluetooth devices to ensure desired behavior, and notifications to let users know if the camera" cannot be verified as a new and original Apple camera. "