What is CVE-2026-86957?

CVE-2026-86957 is a medium-severity vulnerability in Apple iOS And Ipados, classified under Out-of-bounds Read. CVSS score: 6.5/10. Published 2026-10-20.

How severe is CVE-2026-86957?

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

Out-of-bounds Read in Apple iOS And Ipados

CVE-2026-86957

An out-of-bounds read 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, tvOS 27, visionOS 27, watchOS 27. An attacker in wireless proximity may be able to cause unexpected system termination.

Vulnerability class: Buffer Overflow

Published 2026-10-20 · last modified 2026-10-20.

CVSS v3 metric

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

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

Frequently asked questions

What is CVE-2026-86957?: CVE-2026-86957 is a medium-severity vulnerability in Apple iOS And Ipados, classified under Out-of-bounds Read. CVSS score: 6.5/10. Published 2026-10-20.
How severe is CVE-2026-86957?: Medium severity. CVSS v3 base score is 6.5 out of 10.