CVE-2026-20662 Overview
CVE-2026-20662 is an authorization vulnerability in Apple macOS that allows an attacker with physical access to a locked device to view sensitive user information. The vulnerability stems from improper state management in the authorization mechanism, which fails to adequately protect user data when the device is in a locked state.
Critical Impact
Physical attackers can bypass device lock protections to access sensitive user information on macOS systems, potentially exposing personal data, credentials, and confidential documents.
Affected Products
- Apple macOS Sequoia (versions prior to 15.7.4)
- Apple macOS Tahoe (versions prior to 26.3)
Discovery Timeline
- 2026-02-11 - CVE-2026-20662 published to NVD
- 2026-02-12 - Last updated in NVD database
Technical Details for CVE-2026-20662
Vulnerability Analysis
This authorization bypass vulnerability affects the state management component of macOS's device lock mechanism. When a macOS device is locked, certain authorization checks fail to properly validate the current device state, creating a window where sensitive user information remains accessible to someone with physical access to the machine.
The vulnerability requires physical proximity to the target device, which limits its attack surface compared to network-based vulnerabilities. However, the potential for high confidentiality impact makes this a significant concern for environments where physical security cannot be guaranteed, such as shared workspaces, public locations, or scenarios involving device theft.
Root Cause
The root cause lies in the improper state management within macOS's authorization subsystem. When the device transitions to a locked state, the authorization mechanism fails to properly update or enforce access controls for certain data pathways. This creates an inconsistent security state where the system appears locked but certain information remains accessible through physical interaction with the device.
Attack Vector
The attack requires physical access to the target macOS device. An attacker must be in direct proximity to the locked machine to exploit this vulnerability. The exploitation does not require any prior authentication or user interaction, making it a straightforward attack once physical access is obtained.
The attacker can potentially view sensitive user information that should be protected by the device lock screen. This may include recent documents, notifications, or other user data depending on the specific manifestation of the vulnerability.
Detection Methods for CVE-2026-20662
Indicators of Compromise
- Unexpected physical access to macOS devices during off-hours or by unauthorized personnel
- Evidence of device tampering or physical manipulation
- User reports of information exposure on locked devices
- Anomalous access patterns to sensitive files without corresponding authentication events
Detection Strategies
- Implement endpoint detection solutions that monitor for unusual file access patterns on locked devices
- Deploy physical security monitoring and access logging for areas containing sensitive macOS systems
- Enable audit logging for file access events to identify unauthorized data exposure
- Monitor for discrepancies between lock screen state and data access activities
Monitoring Recommendations
- Configure macOS audit logs to capture detailed file access events
- Implement SentinelOne endpoint protection with behavioral analysis to detect anomalous access patterns
- Deploy physical security controls and surveillance in areas with sensitive workstations
- Establish baseline behavior patterns for normal device lock/unlock cycles
How to Mitigate CVE-2026-20662
Immediate Actions Required
- Update macOS Sequoia to version 15.7.4 or later immediately
- Update macOS Tahoe to version 26.3 or later immediately
- Restrict physical access to sensitive macOS devices until patches are applied
- Review and audit recent physical access to affected systems
Patch Information
Apple has addressed this vulnerability with improved state management in the authorization mechanism. Security updates are available through the following advisories:
Apply updates through System Settings > General > Software Update, or download directly from Apple's support website.
Workarounds
- Implement strict physical security controls to prevent unauthorized access to macOS devices
- Consider using FileVault full-disk encryption to add an additional layer of data protection
- Deploy devices in physically secured areas with access control systems
- Enable screen lock with short timeout intervals to minimize exposure windows
# Enable automatic screen lock after inactivity (60 seconds)
defaults write com.apple.screensaver idleTime -int 60
# Require password immediately after screen saver begins
defaults write com.apple.screensaver askForPassword -int 1
defaults write com.apple.screensaver askForPasswordDelay -int 0
# Verify FileVault encryption status
fdesetup status
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
