Apple releases macOS updates fixing Screen Sharing flaw

Apple released a series of critical security updates for Mac computers on Thursday, August 6, 2026, to patch a significant vulnerability in the Screen Sharing feature. The updates, which were issued simultaneously for the three most recent macOS versions, address a flaw that could allow an attacker on the same local network to gain unauthorized access.

The vulnerability, tracked as CVE-2026-65400, involved an authentication weakness in Screen Sharing. According to Apple's security advisory, the flaw meant an attacker could potentially authenticate to the feature without providing valid credentials. The company corrected the issue through improved state management. Screen Sharing allows users to remotely view and control another Mac, meaning the vulnerability could have exposed a user's display and, if permissions allowed, granted control of the computer to a malicious actor.

The specific updates are macOS Tahoe 26.6.1, macOS Sequoia 15.7.9, and macOS Sonoma 14.8.9. Apple credited security researcher Alfredo Pesoli via Bynario Atlas for discovering and reporting the flaw. The company stated it has no evidence the vulnerability was publicly disclosed or actively exploited before...