CVE-2026-44821

Analyzed Analyzed - Analysis Complete

Microsoft Office Out-of-Bounds Read Vulnerability

Publication date: 2026-06-09

Last updated on: 2026-06-19

Assigner: Microsoft Corporation

Description

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

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-06-09

Last Modified

2026-06-19

Generated

2026-06-30

AI Q&A

2026-06-09

EPSS Evaluated

2026-06-28

NVD

CVE-2026-44821

EUVD

EUVD-2026-35664

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	sharepoint_server	2019
microsoft	sharepoint_server	2016
microsoft	365_apps	*
microsoft	365_apps	*
microsoft	office_2019	*
microsoft	office_2019	*
microsoft	office_2016	*
microsoft	office_2016	*
microsoft	sharepoint_server	to 16.0.19725.20384 (exc)
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. It allows an unauthorized attacker to read memory outside the intended boundaries, which can lead to the disclosure of sensitive information on the local system.

Impact Analysis

The impact of this vulnerability is information disclosure. An attacker who exploits this flaw can gain access to sensitive information stored in memory on the affected system without proper authorization.

Compliance Impact

This vulnerability allows an unauthorized attacker to disclose information locally due to an out-of-bounds read in Microsoft Office.

Such unauthorized information disclosure could potentially impact compliance with data protection standards and regulations like GDPR and HIPAA, which require safeguarding sensitive information against unauthorized access.

However, specific details on the nature of the disclosed information or the direct compliance implications are not provided.

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