**[Critical macOS Vulnerability Exposed: Remote Login Possible Without Password When Screen Sharing is Enabled, Apple Has Released a Fix – Upgrade to Version 26.6.1 Recommended]** According to monitoring by *动察 Beating*, security researcher Calif has disclosed a severe security vulnerability (CVE-2026-65400) in macOS's screen sharing feature. If a user's computer has screen sharing enabled, any network attacker can exploit this vulnerability to log into the computer using any account without needing to know the password. Researchers conducted reverse engineering on the macOS 26.6.1 patch released by Apple, identified the root cause of the vulnerability, and published proof-of-concept code. Apple has addressed this vulnerability in macOS version 26.6.1, and all Mac users are strongly advised to upgrade their systems to this version as soon as possible. A complete technical analysis report will be released tomorrow. This vulnerability has been classified as "Critical"—unauthenticated remote code execution means attackers can gain full desktop control, making it one of the most severe types of security vulnerabilities in desktop operating systems. Currently, there is no evidence that this vulnerability has been widely exploited in real-world scenarios. However, given that proof-of-concept code has been made public, unpatched systems are facing rapidly increasing risks. If users are temporarily unable to upgrade, disabling the screen sharing feature before upgrading can serve as a temporary mitigation measure. Click the original link below to join the *动察 Beating · Feishu AI News Channel* for 24/7 global AI news and updates. [Original Link]