Apple Patches Critical Screen Sharing Vulnerability
Security update fixes flaw that allowed unauthorized access to Mac screens.
1Critical Vulnerability Discovered
Apple identified a critical security flaw (CVE-2026-65400) in macOS's Screen Sharing feature. This vulnerability could allow attackers on your network to access Screen Sharing without valid credentials. The issue affected macOS Tahoe 26.6.1, Sequoia 15.7.9, and Sonoma 14.8.9 versions. Apple promptly released updates to address this vulnerability across all affected operating system versions.
2Unauthorized Access Risk
The security flaw potentially allowed attackers to view a user's screen without permission. In some cases, it might have even enabled full computer takeover. This could have led to exposure of personal files, messages, and other sensitive data. Apple confirmed there's no evidence the vulnerability was actively exploited in the wild before the patch was released.
3Security Updates Released
Apple issued emergency updates for the latest three macOS versions to fix the Screen Sharing vulnerability. The patches are available for Tahoe 26.6.1, Sequoia 15.7.9, and Sonoma 14.8.9 users. The company strongly recommends all users install these updates immediately. The security patches can be installed through System Settings > General > Software Update.
4AI Models and Vulnerability Discovery
Apple stated this vulnerability hadn't been publicly disclosed or actively exploited. However, some AI models like Claude Mythos have demonstrated capability in discovering security flaws. This raised the possibility that attackers might have found the vulnerability before Apple did. Fortunately, with the patches now available, this risk has been mitigated.
5How Screen Sharing Works
macOS Screen Sharing allows users to share their computer screen with another user. Normally, this feature requires explicit permission from both parties. The security flaw potentially bypassed these authentication requirements. Apple hasn't disclosed technical details about exactly how the vulnerability worked to prevent further exploitation attempts.
6What Users Should Do
Apple urges all macOS users to install the security updates immediately. To update, go to System Settings > General > Software Update and check for available updates. Some updates may require a system restart. The company emphasizes that timely installation of security updates is crucial for maintaining system integrity and protecting sensitive data.
7Historical Context of Similar Flaws
Apple has encountered similar security vulnerabilities in the past, particularly with screen sharing and remote access features. In 2022, a comparable flaw was identified and quickly patched. Apple's rapid response to such issues demonstrates their commitment to user security and maintaining trust in their ecosystem.
8Conclusion and Recommendations
This vulnerability serves as another reminder of the importance of cybersecurity. Apple's quick response prevented what could have been a significant security incident. Users should regularly check for and install security updates. Additionally, caution should be exercised when using sensitive features like Screen Sharing, even after patches are applied.
Original article: Lifehacker — Apple Ekran Paylaşımı Güvenlik Açığını Kapattı