---
title: "CVE-2026-64736: Apple iOS & macOS - Out of Bounds Read/Write"
description: "Apple iOS 26.6.1, iPadOS 26.6.1, macOS Sequoia 15.8, macOS Tahoe 26.6.2, tvOS 27, visionOS 27, and watchOS 27 contain an out-of-bounds read/write caused by insufficient bounds checking, letting apps cause system termination or kernel memory corruption, exploit requires malicious app."
url: https://panop.io/threat-heartbeat/CVE-2026-64736/
---

# CVE-2026-64736 Apple iOS & macOS - Out of Bounds Read/Write

Apple iOS 26.6.1, iPadOS 26.6.1, macOS Sequoia 15.8, macOS Tahoe 26.6.2, tvOS 27, visionOS 27, and watchOS 27 contain an out-of-bounds read/write caused by insufficient bounds checking, letting apps cause system termination or kernel memory corruption, exploit requires malicious app.

CVSS base score 7.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.16% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-64736)

## Details

Type

Out of Bounds Read/Write

Impact

Denial Of Service

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Published

14 September 2026

Updated

15 October 2026

Weakness

[CWE-125](https://cwe.mitre.org/data/definitions/125.html)

## Vendor fix

Update to iOS 26.6.1, iPadOS 26.6.1, macOS Sequoia 15.8, macOS Tahoe 26.6.2, tvOS 27, visionOS 27, watchOS 27 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-64736](https://nvd.nist.gov/vuln/detail/CVE-2026-64736)
- [https://support.apple.com/en-us/149037](https://support.apple.com/en-us/149037)
- [https://support.apple.com/en-us/149038](https://support.apple.com/en-us/149038)
- [https://support.apple.com/en-us/149043](https://support.apple.com/en-us/149043)
- [https://support.apple.com/en-us/148281](https://support.apple.com/en-us/148281)
- [https://support.apple.com/en-us/148282](https://support.apple.com/en-us/148282)
- [https://support.apple.com/en-us/149036](https://support.apple.com/en-us/149036)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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