CVE-2026-86981

Analyzed Analyzed - Analysis Complete

Out-of-Bounds Write in macOS Sequoia

Publication date: 2026-10-20

Last updated on: 2026-10-29

Assigner: Apple Inc.

Description

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.8, macOS Tahoe 26.7. An app may be able to cause unexpected system termination.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-10-20

Last Modified

2026-10-29

Generated

2026-11-09

AI Q&A

2026-10-20

EPSS Evaluated

2026-11-07

NVD

CVE-2026-86981

EUVD

EUVD-2026-104741

Affected Vendors & Products

Vendor	Product	Version / Range
apple	macos	From 15.0 (inc) to 15.8 (exc)
apple	macos	From 26.0 (inc) to 26.7 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-787	The product writes data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This is an out-of-bounds write vulnerability caused by insufficient bounds checking. An application could write data outside the intended memory area, potentially leading to system instability or crashes.

Detection Guidance

This vulnerability is specific to macOS and requires bounds checking improvements. Detection involves verifying macOS version compatibility with the patched releases (macOS Sequoia 15.8 or macOS Tahoe 26.7). Use the command 'sw_vers' to check your current macOS version.

Impact Analysis

An attacker could exploit this to cause unexpected system termination on affected devices running vulnerable macOS versions. This may result in data loss or denial of service.

Compliance Impact

The provided CVE data does not specify any direct impact on compliance with standards like GDPR or HIPAA. The vulnerability involves an out-of-bounds write issue in macOS, which could lead to unexpected system termination but lacks details on data exposure or privacy implications.

Mitigation Strategies

Update to macOS Sequoia 15.8 or macOS Tahoe 26.7 to address the out-of-bounds write issue.

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