Apple recently released updates to macOS Tahoe, Sequoia, and Sonoma stating that they fixed a serious screen sharing vulnerability. At the time, there was no indication that the security flaw was being exploited, but now there is, so if you haven’t yet updated your Mac, you’ll want to do so ASAP.

Earlier this month, Apple released macOS Sonoma 14.8.9, macOS Sequoia 15.7.9, and macOS Tahoe 26.6.1, with the release notes initially stating only that they provided “important security fixes” and were recommended for all users. The company later expanded on this. An attacker on the network may be able to authenticate to Screen Sharing without valid credentials. Screen sharing is 大发快三怎么看 of course one of the most dangerous features for a security hole, since it potentially allows an attacker to view your screen, open apps and files, and do pretty much anything else they could do if they had physical possession of your logged‑in machine.

The Netherlands National Cyber Security Centrum has received a notification indicating that active abuse of this vulnerability has been observed on multiple systems on which port 5900 was accessible from the Internet. In all these cases, root had been accessed on the affected system and a Monero crypto miner had been placed. As the site notes, the fact that this is being actively exploited raises the prospect of attackers stealing credentials and more. If you are running any of these macOS versions and haven’t yet updated, you should do so immediately. It’s also best practice to ensure that screen sharing is only enabled when you actively want to use the feature.

Screen sharing can be turned on or off by accessing System Settings > General > Sharing and toggling the switch for Screen Sharing. It should be disabled immediately after your session ends.