It’s time to patch your Mac, iDevices and software again: Apple has released security updates for MacOS (all the way back to Yosemite), iOS, watchOS, tvOS, iTunes, iCloud for Windows, and Safari.

The iTunes and iCloud for Windows updates fix one vulnerability in WebKit each. But both of these are critical, as they can be triggered by maliciously crafted web content and could lead to arbitrary code execution.

One of these flaws also affects Safari, but the Apple security team fixed also a bucketload of other WebKit memory corruption issues that can be exploited in the same way and lead to either arbitrary code execution or universal cross site scripting.