CVE-2018-21056: 
NixOS vulnerability analysis and mitigation

An issue was discovered on Samsung mobile devices with O(8.x) software where the Smartwatch displays Secure Folder Notification content. This vulnerability was identified in September 2018 with Samsung ID SVE-2018-12458 (Samsung Advisory).

The vulnerability has been assigned a CVSS 3.1 Base Score of 4.6 (MEDIUM) with the vector string CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. Under CVSS 2.0, it received a Base Score of 2.1 (LOW) with vector (AV:L/AC:L/Au:N/C:P/I:N/A:N). The vulnerability is classified as CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) (NVD).

The vulnerability allows unauthorized exposure of Secure Folder Notification content on the Smartwatch, potentially revealing sensitive information to anyone who can physically view the smartwatch display (NVD).

The vulnerability requires physical access to view the device's display but does not require authentication or user interaction to exploit. The attack complexity is considered low (NVD).

Samsung has addressed this vulnerability through their security update process. Users should ensure their devices are updated to the latest available software version (Samsung Advisory).