CVE-2026-43807

Analyzed Analyzed - Analysis Complete

Buffer Overflow in Apple iOS and macOS

Publication date: 2026-07-27

Last updated on: 2026-07-28

Assigner: Apple Inc.

Description

A buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 26.5.2 and iPadOS 26.5.2, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, watchOS 26.6. A malicious accessory may be able to cause unexpected app termination.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-07-27

Last Modified

2026-07-28

Generated

2026-08-17

AI Q&A

2026-07-28

EPSS Evaluated

2026-08-16

NVD

CVE-2026-43807

EUVD

EUVD-2026-49481

Affected Vendors & Products

Vendor	Product	Version / Range
apple	ipados	to 26.5.2 (exc)
apple	iphone_os	to 26.5.2 (exc)
apple	macos	From 26.0 (inc) to 26.5.2 (exc)
apple	macos	From 14.0 (inc) to 14.8.8 (exc)
apple	macos	From 15.0 (inc) to 15.7.8 (exc)
apple	tvos	to 26.6 (exc)
apple	visionos	to 26.6 (exc)
apple	watchos	to 26.6 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-120	The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.

Attack-Flow Graph

Executive Summary

This vulnerability is a buffer overflow caused by insufficient bounds checking. It allows a malicious accessory to trigger unexpected app termination by exploiting this flaw.

Detection Guidance

This vulnerability is specific to Apple operating systems and is addressed by updating to patched versions. Detection involves checking your device's current OS version against the fixed versions mentioned in the CVE. For iOS/iPadOS, go to Settings > General > About. For macOS, go to About This Mac. If your version is below the fixed release, the device is vulnerable.

Impact Analysis

The impact includes potential crashes of applications due to unexpected termination. This could lead to data loss or denial of service if critical apps are affected.

Compliance Impact

The provided CVE data does not specify any direct impact on compliance with standards like GDPR or HIPAA. The vulnerability involves a buffer overflow that could cause unexpected app termination, but no data exposure or privacy implications are mentioned.

Mitigation Strategies

Immediately update all Apple devices to the latest versions: iOS 26.5.2, iPadOS 26.5.2, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, or watchOS 26.6. Enable automatic updates if not already enabled to prevent future vulnerabilities.

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