iPhone users are advised to go to Settings immediately to ensure they have the most recent operating system installed. Apple has officially released iOS 26.3, which includes “critical bug fixes and security enhancements,” according to the company.

Upon installation, it addresses a total of 39 vulnerabilities, with one of them being classified as zero-day. This zero-day designation indicates that malicious actors may have identified the issue and could be actively exploiting it in real-world scenarios.

In a recent update on its support page, Apple stated: “Apple is aware of reports suggesting that this vulnerability may have been utilized in a highly sophisticated attack targeting specific individuals using versions of iOS predating iOS 26.”

While it is always recommended to keep devices up to date, this latest release is of particular significance due to this specific issue. Moreover, various other security flaws across apps and services have been patched with this update.

To ensure that your iPhone is running the latest software, navigate to Settings – General – Software Update.

You should find iOS 26.3 available for download there. It is advisable to perform the installation over a Wi-Fi connection, and remember that your device will need to restart, so avoid updating if you are anticipating an important call or message.

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