Vulnerability in Apple macOS
CVE-2025-43276
A logic error was addressed with improved error handling. This issue is fixed in macOS Sequoia 15.6. iCloud Private Relay may not activate when more than one user is logged in at the same time.
Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)
EPSS: 0.004 (28.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Apple Macos — versions 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- product-security@apple.com (Release Notes, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2025-43276?
- CVE-2025-43276 is a medium-severity vulnerability in Apple macOS, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 5.3/10. Published 2025-07-30.
- How severe is CVE-2025-43276?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2025-43276 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.