What is CVE-2026-84510?

CVE-2026-84510 is a medium-severity vulnerability in Apple iOS And Ipados, classified under Heap-based Buffer Overflow. CVSS score: 6.5/10. Published 2026-09-14.

How severe is CVE-2026-84510?

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

Buffer overflow in Apple iOS And Ipados

CVE-2026-84510

A heap buffer overflow was addressed with improved bounds checking. 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. Mounting a maliciously crafted volume may lead to unexpected system termination.

Vulnerability class: Buffer Overflow

Published 2026-09-14 · last modified 2026-09-18.

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.

EPSS exploit prediction

EPSS: 0.005 (39.2th percentile), scored 2026-10-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 39.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

support.apple.com/en-us/149034 (Vendor Advisory)
support.apple.com/en-us/149035 (Vendor Advisory)
support.apple.com/en-us/149041 (Vendor Advisory)
support.apple.com/en-us/149042 (Vendor Advisory)
support.apple.com/en-us/149043 (Vendor Advisory)

Frequently asked questions

What is CVE-2026-84510?: CVE-2026-84510 is a medium-severity vulnerability in Apple iOS And Ipados, classified under Heap-based Buffer Overflow. CVSS score: 6.5/10. Published 2026-09-14.
How severe is CVE-2026-84510?: Medium severity. CVSS v3 base score is 6.5 out of 10.