What is CVE-2026-84489?

CVE-2026-84489 is a medium-severity vulnerability in Apple iOS And Ipados, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 5.5/10. Published 2026-09-14.

How severe is CVE-2026-84489?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Buffer overflow in Apple iOS And Ipados

CVE-2026-84489

A buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 18.7.10 and iPadOS 18.7.10, iOS 27 and iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8. An app may be able to cause a denial of service.

Vulnerability class: Buffer Overflow

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

Apple Ios And Ipados
Apple Macos

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

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

Frequently asked questions

What is CVE-2026-84489?: CVE-2026-84489 is a medium-severity vulnerability in Apple iOS And Ipados, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 5.5/10. Published 2026-09-14.
How severe is CVE-2026-84489?: Medium severity. CVSS v3 base score is 5.5 out of 10.