CVE-2026-43757

Analyzed Analyzed - Analysis Complete

Out-of-Bounds Read in macOS

Publication date: 2026-07-27

Last updated on: 2026-07-28

Assigner: Apple Inc.

Description

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. An app may be able to cause unexpected system 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

2026-08-15

NVD

CVE-2026-43757

EUVD

EUVD-2026-49463

Affected Vendors & Products

Vendor	Product	Version / Range
apple	macos	From 14.0 (inc) to 14.8.8 (exc)
apple	macos	From 15.0 (inc) to 15.7.8 (exc)
apple	macos	From 26.0 (inc) to 26.6 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-125	The product reads data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This vulnerability is an out-of-bounds read issue caused by insufficient bounds checking. It allows an application to read memory outside the intended buffer, which could lead to unexpected system termination or other unintended behavior.

Detection Guidance

This vulnerability is specific to Apple macOS versions and does not provide direct detection commands. Check your macOS version against the fixed releases (Sequoia 15.7.8, Sonoma 14.8.8, Tahoe 26.6) using 'sw_vers' command. If your version is older, the system is vulnerable.

Impact Analysis

An attacker could exploit this to cause an app to crash or terminate unexpectedly. This may disrupt services or lead to denial-of-service conditions on affected systems.

Compliance Impact

This vulnerability is an out-of-bounds read issue that could cause unexpected system termination. It does not directly impact compliance with standards like GDPR or HIPAA as it is a local system issue rather than a data exposure or privacy breach.

Mitigation Strategies

Update your macOS to the latest fixed version immediately. Go to System Settings > General > Software Update and install any available updates. If updates are not available, check Apple's security advisories for manual patch instructions.

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