On 8 March 2021, Apple launched a update security software for almost all devices in the ecosystem.
iPhone / iPad received iOS 14.4.1 / iPadOS 14.4.1, for Mac version has been released macOS Big Sur 11.2.3and Apple Watch received Watch 7.3.2.
All versions have in common the solution of a security problem, which allowed the execution of an arbitrary malicious code, through the web content.
Impact: Processing maliciously crafted web content may lead to arbitrary code execution
Description: A memory corruption issue was addressed with improved validation.
CVE-2021-1844: Clément Lecigne of Google's Threat Analysis Group, Alison Huffman of Microsoft Browser Vulnerability Research
Apparently, this problem was quite serious and could not stand delay. Apple will launch in the next period watchOS 7.4, a version that will bring some interesting news for owners of Apple Watch. This update However, it did not support the postponement to be included in a future version.
Regarding macOS Catherine yes macOS Mojave, and on these devices is available an update for Safari, which will solve this security problem.
The update is also available recommended for all devicesURLs iPhone 6s (or newer meds), iPad mini 4 (or newer models), iPod touch (gen. 7), Apple Watch Series 3 (or newer models) and all MacURLs with macOS Mojave, Catalina or macOS Big Sur.Security Software Update for Mac, iPhone, iPad si Apple Watch [March 2021]