CVE-2026-68808

Analyzed Analyzed - Analysis Complete

Microsoft Office Excel Out-of-Bounds Read Vulnerability

Publication date: 2026-08-11

Last updated on: 2026-08-13

Assigner: Microsoft Corporation

Description

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-11

Last Modified

2026-08-13

Generated

2026-09-01

AI Q&A

2026-08-11

EPSS Evaluated

2026-08-30

NVD

CVE-2026-68808

EUVD

EUVD-2026-56460

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	365_apps	*
microsoft	365_apps	*
microsoft	excel	2016
microsoft	excel	2016
microsoft	office_2019	*
microsoft	office_2019	*
microsoft	microsoft_365	*
microsoft	office_2021	*
microsoft	office_2021	*
microsoft	office_2021	*
microsoft	office_2024	*
microsoft	office_2024	*
microsoft	office_2024	*

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 in Microsoft Office Excel. It allows an unauthorized attacker to read memory outside the intended boundaries, which can lead to the disclosure of sensitive information stored locally on the affected system.

Detection Guidance

This vulnerability is an out-of-bounds read in Microsoft Office Excel that allows local information disclosure. Detection typically involves checking for vulnerable versions of Excel and applying Microsoft's official patches. Use Windows Update or check installed Office versions via 'Control Panel > Programs > Programs and Features' for Excel entries. No specific commands are provided in the context to directly detect this issue.

Impact Analysis

This vulnerability could allow an attacker to access confidential data stored in Excel files on your local machine. Since it requires user interaction to trigger, opening a specially crafted file could expose sensitive information without further authentication.

Compliance Impact

This vulnerability could lead to unauthorized data disclosure, which may violate compliance requirements under GDPR or HIPAA if sensitive personal or health information is exposed. Organizations must address this to maintain regulatory compliance.

Mitigation Strategies

Apply the latest security updates from Microsoft for Office Excel as soon as they become available to patch the out-of-bounds read vulnerability.

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