CVE-2026-43777
Analyzed Analyzed - Analysis Complete

Denial of Service in macOS

Publication date: 2026-07-27

Last updated on: 2026-07-28

Assigner: Apple Inc.

Description
This issue was addressed with improved input validation. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. A remote attacker may be able to cause a denial of service.

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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-2026-43777
EUVD
EUVD-2026-49448

Affected Vendors & Products

Showing 3 associated CPEs
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
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KEV
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CWE ID Description
CWE-20 The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

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Executive Summary

This vulnerability involves a remote attacker potentially causing a denial of service due to insufficient input validation. It was addressed in specific macOS versions.

Detection Guidance

This vulnerability is addressed in specific macOS updates. Detection involves checking your macOS version against the patched versions: macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, or macOS Tahoe 26.6. Use the command 'sw_vers' in Terminal to check your current macOS version.

Impact Analysis

A remote attacker could exploit this to disrupt system availability, leading to service outages or crashes on affected macOS devices.

Compliance Impact

The provided CVE data does not specify any direct impact on compliance with standards like GDPR or HIPAA. The vulnerability is described as a denial of service issue addressed with improved input validation, but no compliance implications are mentioned.

Mitigation Strategies

Immediately update your macOS to the latest patched version: macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, or macOS Tahoe 26.6. This addresses the input validation issue and prevents potential denial of service attacks.

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