Reprinted from TidBITS by permission; reuse governed by Creative Commons license BY-NC-ND 3.0. TidBITS has offered years of thoughtful commentary on Apple and Internet topics. For free email subscriptions and access to the entire TidBITS archive, visit http://www.tidbits.com/ Apple Updates Block Two Zero-Day Security Vulnerabilities Adam Engst Apple has released a flurry of updates in response to a pair of security vulnerabilities that the company says 'may have been actively exploited on Intel-based Mac systems.' That's an unusual level of specificity for Apple, especially given that the vulnerabilities are in core code shared by other platforms. The two vulnerabilities are highly problematic. The JavaScriptCore vulnerability allows for arbitrary code execution, and the WebKit vulnerability enables maliciously crafted Web content to lead to a cross-site scripting attack. Both vulnerabilities were identified by Clément Lecigne and Benoît Sevens of Google's Threat Analysis Group. [1]Apple's updates so far include: * macOS 15.1.1 Sequoia * iOS 18.1.1 and iPadOS 18.1.1 * iOS 17.7.2 and iPadOS 17.7.2 * visionOS 2.1.1 * Safari 18.1.1 for macOS 14 Sonoma and macOS 13 Ventura The release notes are identical for all of them, and there's no indication that anything else has changed. I wouldn't be surprised if tvOS is technically vulnerable but not worth updating, and it's hard to imagine watchOS or HomePod Software being vulnerable in any real way. Given the severity of these vulnerabilities and the fact that they have been exploited in the wild, I encourage you to install these updates soon. References 1. https://support.apple.com/en-us/100100 .