macOS CVE-2026-28840

Apply vendor-released patches immediately for affected macOS versions: upgrade macOS Tahoe to version 26.4 or later, macOS Sequoia to version 15.7.7 or later, or macOS Sonoma to version 14.8.7 or later via System Settings > General > Software Update or through Apple Remote Desktop for enterprise deployments (advisory links: https://support.apple.com/en-us/127117, https://support.apple.com/en-us/126794, https://support.apple.com/en-us/127116). For systems where immediate patching is not feasible, implement compensating controls: restrict local user account creation and limit sudo privileges through Directory Service controls; deploy EDR solutions monitoring abnormal privilege escalation attempts (audit for unexpected privilege token manipulation or permission changes); enable comprehensive logging of authorization events via unified logging system with 'log show --predicate' filters for privilege changes. Note these mitigations only reduce attack surface and do not eliminate vulnerability - they add friction for attackers already possessing local access but will not prevent exploitation by determined adversaries. Organizations using mobile device management should prioritize patch deployment through automated update policies, as local access prerequisite means exploitation requires prior endpoint compromise.