Use After Free in Apple iOS And Ipados

CVE-2026-84521

A use after free issue was addressed with improved memory management. This issue is fixed in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7, visionOS 27. An app may be able to cause unexpected system termination.

Vulnerability class: Use-After-Free

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-84521?
CVE-2026-84521 is a medium-severity vulnerability in Apple iOS And Ipados, classified under Use After Free. CVSS score: 5.5/10. Published 2026-09-14.
How severe is CVE-2026-84521?
Medium severity. CVSS v3 base score is 5.5 out of 10.