What is CVE-2026-84536?

CVE-2026-84536 is a medium-severity vulnerability in Apple macOS, classified under Integer Overflow or Wraparound. CVSS score: 6.5/10. Published 2026-09-14.

How severe is CVE-2026-84536?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Integer overflow in Apple macOS

CVE-2026-84536

An integer underflow was addressed with improved input validation. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. Connecting to a malicious SMB server may lead to unexpected system termination.

Vulnerability class: Integer Overflow

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Apple Macos

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

product-security@apple.com
product-security@apple.com
product-security@apple.com

Frequently asked questions

What is CVE-2026-84536?: CVE-2026-84536 is a medium-severity vulnerability in Apple macOS, classified under Integer Overflow or Wraparound. CVSS score: 6.5/10. Published 2026-09-14.
How severe is CVE-2026-84536?: Medium severity. CVSS v3 base score is 6.5 out of 10.