Just last week, Apple notified customers about a serious security vulnerability that was patched in macOS 11.3. And just a week later, it’s now warning over another bug fix in a macOS 11.3.1 release that corrects two separate issues which, if exploited, would allow for arbitrary code execution.
It’s possible that these new vulns are actively being exploited – allowing hackers to run commands of their choosing. Bottom line: if you’re a mac user – download the update… yesterday! (Now, do it now.)