Hackers Are Screen Sharing on Macs Without Permission, but You Can Stop Them

We may earn a commission from links on this page. Whether you have a MacBook Neo or an iMac , stay vigilant: Hackers are exploiting a known security vulnerability in macOS that allows bad actors to activate Screen Sharing without the proper permissions. Because macOS lets screen sharers control screens remotely, this flaw is particularly dangerous. Luckily, Apple fixed this issue before anyone knew the flaw was exploited. The company released three new security updates for Macs on Thursday, Aug. 6. You don't need to be running the latest version, macOS 26, to take advantage of these updates, either. While the company does have a new Tahoe update, Apple's security updates here include releases for both macOS 15 Sequoia and macOS 14 Sonoma as well—and all of these updates patch this screen sharing flaw. Apple's latest macOS security patches fix a Screen Sharing vulnerability macOS Tahoe 26.6.1 , macOS Sequoia 15.7.9 , and macOS Sonoma 14.8.9 all contain the same, singular security patch: Tracked as CVE-2026-65400, this fix is for a Screen Sharing flaw that Apple says could allow an attacker on your network to "authenticate to Screen Sharing without valid credentials." In layman's terms, this security flaw could let hackers activate Screen Sharing without permission, which would leave the contents of your Mac's display totally open to anyone in the know. Apple's Screen Sharing feature is complex, which is good for usability but potentially dangerous in this case. Not only …