CVE-2026-68802

Analyzed Analyzed - Analysis Complete

Out-of-bounds read in Microsoft Office Excel

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

Probability:
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Meta Information

Published

2026-08-11

Last Modified

2026-08-13

Generated

2026-08-31

AI Q&A

2026-08-11

EPSS Evaluated

2026-08-30

NVD

CVE-2026-68802

EUVD

EUVD-2026-56457

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 buffer, 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 unusual Excel file behavior or crashes. Monitor for Excel application crashes or unexpected memory access errors. Ensure Excel and system updates are applied to mitigate risks.

Impact Analysis

This vulnerability could allow an attacker to access confidential data stored in Excel files on your local machine. The attacker would need some level of access to your system to exploit it, but it could lead to unauthorized information disclosure.

Compliance Impact

This vulnerability could lead to unauthorized disclosure of sensitive personal or health data, which may violate GDPR or HIPAA compliance requirements. Organizations must address this to maintain data protection standards and avoid regulatory penalties.

Mitigation Strategies

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

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