Apple urges swift action to counter three iOS zero-day exploits

Emre Çitak
May 22, 2023

In a recent security bulletin, Apple issued a strong recommendation to its user base, urging them to promptly install the available iOS updates. This urgent call to action comes in response to the alarming discovery of three zero-day exploits that are currently being actively exploited on unpatched devices.

The company has deployed a security patch using its new Rapid Security Response automatic update system, emphasizing the critical importance of upgrading devices to ensure their protection. The updates not only address the three zero-day exploits but also tackle over 30 other vulnerabilities identified in the recent iOS 16.4 release.

3 zero-day exploits found in devices running iOS 16.4 - Image courtesy of Apple

Vulnerabilities are linked to WebKit browser engine

The identified zero-day vulnerabilities are directly associated with the WebKit browser engine, posing significant risks to the security and privacy of users. Exploiting these vulnerabilities can allow attackers to breach the Web Content security sandbox, disclose sensitive information through web content processing, and execute arbitrary code through maliciously crafted web content.

Such security holes can potentially expose users' personal data to unauthorized third parties and enable the execution of unauthorized commands or code on targeted devices or processes.

Affected devices

With Apple's user base surpassing the two billion active device mark earlier this year, the scale of the issue at hand becomes evident. The widespread adoption of Apple devices amplifies the challenges faced in securing the ecosystem. Given the nature of the vulnerabilities, the exploit targeting the WebKit browser engine has the potential to impact a large portion of these two billion devices.

Specifically, the affected devices include various iPad models (such as iPad Pro, iPad Air, iPad 5th generation, and iPad Mini), iPhone models from 6s onwards, Mac workstations and laptops running macOS, Apple Watch (series 4 and later), and Apple TV 4K and HD.

Update as soon as possible

While Apple has deployed automatic updates through its Rapid Security Response system, some users may still be awaiting the update due to regional deployment or connectivity issues. For those individuals, it is crucial to manually update their devices to version 16.5.

This can be accomplished by accessing the Settings app, navigating to General > Software Update, and initiating the "download and install" process. Allowing the device a few minutes to complete the update process is vital to ensure the security patch is applied successfully.

The Apple zero-day exploit affects almost all Apple products

Furthermore, it is highly recommended to maintain device hygiene by ensuring all other Apple devices are also up-to-date with the latest software versions. Consistently updating devices is a simple process, as the option to download updates manually can be found in the same location on all devices: under Settings > General > Software Update.

But it's worth noting that in Apple's 16.5 iOS update, many users are reporting that lightning to USB 3 adapters no longer work. We're sure Apple will fix this soon, so we recommend you update your device as soon as possible for your safety.


Tutorials & Tips

Previous Post: «
Next Post: «


  1. Anonymous said on May 24, 2023 at 10:48 pm

    For Apple security is a useful buzzword to justify all sorts of creative user humiliation just to exploit them more, but it looks like things like enforcing their webkit engine are sometimes more a threat than a security guarantee.

Leave a Reply

Check the box to consent to your data being stored in line with the guidelines set out in our privacy policy

We love comments and welcome thoughtful and civilized discussion. Rudeness and personal attacks will not be tolerated. Please stay on-topic.
Please note that your comment may not appear immediately after you post it.