Integer overflow in Apple macOS
CVE-2026-84554
An integer overflow was addressed with improved input validation. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An attacker in a privileged network position may be able to cause a denial-of-service.
Vulnerability class: Integer Overflow
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-84554?
- CVE-2026-84554 is a medium-severity vulnerability in Apple macOS, classified under Integer Overflow or Wraparound. CVSS score: 5.9/10. Published 2026-09-14.
- How severe is CVE-2026-84554?
- Medium severity. CVSS v3 base score is 5.9 out of 10.