---
id: CVE-2025-43506
title: A logic error was addressed with improved error handling
summary: >-
  A logic error was addressed with improved error handling. This issue is fixed
  in macOS Tahoe 26.1. iCloud Private Relay may not activate when more than one
  user is logged in at the same time.
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-843
vendor: apple
product: macos
affected:
  - macos < 26.1
patched:
  - macos 26.1
published: '2025-12-12'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T20:10:01.970'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-43506'
references:
  - url: 'https://support.apple.com/en-us/125634'
    label: product-security@apple.com
tags:
  - nvd
epss: 0.00467
epssPercentile: 0.38331
ingestedAt: '2026-10-07T20:46:46.917Z'
---

## Overview

A logic error was addressed with improved error handling. This issue is fixed in macOS Tahoe 26.1. iCloud Private Relay may not activate when more than one user is logged in at the same time.

## Affected

- `macos < 26.1`

## Remediation

Upgrade past the affected range:

- `macos 26.1`