Update your Apple devices
Yes, there was just an update (to 14.5). But security is a process, not a product. It needs to be constantly monitored and improved.
iPhone 6s and later, iPad Pro (all models), iPad Air 2 and later, iPad 5th generation and later, iPad mini 4 and later, and iPot touch (7th generation)
Impact: Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that issue may have been actively exploited.
Description: An integer overflow was addressed with improved input validation.
CVE-2021-30663: an anonymous researcher