The issue was addressed by removing the relevant flags. This issue is fixed in iOS 18.2 and iPadOS 18.2, watchOS 11.2. A system binary could be used to fingerprint a user's Apple Account.
https://support.apple.com/en-us/121843
https://support.apple.com/en-us/121837
Source: Mitre, NVD
Published: 2025-01-27
Updated: 2026-04-02
Base Score: 9.4
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N
Severity: High
Base Score: 9.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Severity: Critical
EPSS: 0.00043