CVE-2026-68797

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

2026-09-01

AI Q&A

2026-08-11

EPSS Evaluated

2026-08-30

NVD

CVE-2026-68797

EUVD

EUVD-2026-56753

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	365_apps	*
microsoft	365_apps	*
microsoft	excel	2016
microsoft	excel	2016
microsoft	office_2019	*
microsoft	office_2016	*
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 is an out-of-bounds read vulnerability in Microsoft Office Excel. It allows an unauthorized attacker to access memory outside the intended range, which can lead to disclosure of sensitive information stored locally on the affected system.

Detection Guidance

Detection of this vulnerability requires checking for outdated versions of Microsoft Office Excel. Use the following commands to verify installed versions: On Windows, run 'wmic product where "name like 'Microsoft Office%Excel%'" get name, version' in Command Prompt. Compare the output against Microsoft's latest security updates.

Impact Analysis

An attacker could exploit this to read data from memory that they should not have access to, potentially exposing confidential or sensitive information stored on your computer.

Compliance Impact

This vulnerability allows unauthorized disclosure of local information through an out-of-bounds read in Microsoft Office Excel. Such information disclosure risks could potentially violate data protection requirements under GDPR or HIPAA if sensitive personal or health data is exposed.

Mitigation Strategies

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

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