Apple
Apple has released security updates for macOS that fix a bug in Screen Sharing, the built-in tool that lets someone remotely control your Mac. That bug could have let another device on the same network connect without your password.
The flaw affects how macOS checks credentials before starting a Screen Sharing session. Apple says an attacker on the same Wi-Fi or wired network as your Mac could exploit the bug to connect without valid login information. The fix ships in macOS Tahoe 26.6.1, macOS Sequoia 15.7.9, and macOS Sonoma 14.8.9.
Screen Sharing is turned off by default on Macs, so only people who manually enabled it are exposed. However, Screen Sharing is commonly used for remote tech support or reaching a home computer from elsewhere, so it's a good idea to check if you've ever enabled the feature. Apple's release notes don't indicate the bug was exploited before it was found. Screen Sharing is a Mac-specific feature, so iPhones and iPads aren't affected.
To install the fix, open System Settings, then General, then Software Update, and install the latest update available for your version of macOS. If you don't use Screen Sharing, you can turn it off entirely in System Settings under General, then Sharing, which removes the risk whether or not you've updated yet.
Read next: Fake Zoom update scam that hit Windows PCs now targets Macs too
