CVE-2026-55050

Analyzed Analyzed - Analysis Complete

Out-of-Bounds Read in Microsoft Office Word

Publication date: 2026-07-14

Last updated on: 2026-07-16

Assigner: Microsoft Corporation

Description

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

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-07-14

Last Modified

2026-07-16

Generated

2026-08-04

AI Q&A

2026-07-15

EPSS Evaluated

2026-08-02

NVD

CVE-2026-55050

EUVD

EUVD-2026-44182

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	sharepoint_server	2019
microsoft	sharepoint_server	2016
microsoft	365_apps	*
microsoft	365_apps	*
microsoft	word	2016
microsoft	word	2016
microsoft	office_2019	*
microsoft	office_2019	*
microsoft	microsoft_365	*
microsoft	office_2021	*
microsoft	office_2021	*
microsoft	office_2024	*
microsoft	office_2024	*
microsoft	sharepoint_server	to 16.0.19725.20434 (exc)
microsoft	office_2021	to 16.111.26071215 (exc)
microsoft	office_2024	to 16.111.26071215 (exc)
microsoft	office_online_server	to 16.0.10417.20175 (exc)

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 flaw in Microsoft Office Word. It allows an unauthorized attacker to access and disclose information stored locally on a system by reading memory outside the intended boundaries.

Detection Guidance

This vulnerability is an out-of-bounds read in Microsoft Office Word that allows local information disclosure. Detection typically involves checking for vulnerable versions of Microsoft Office Word and monitoring for unusual information access patterns. Use Microsoft's official update tool to verify if your system is patched.

Impact Analysis

An attacker could exploit this to access sensitive data stored on your device, such as documents or files opened in Word. This may lead to unauthorized information disclosure but does not allow code execution or system control.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, potentially violating GDPR or HIPAA requirements for data protection and confidentiality. Organizations may face compliance risks if exploited.

Mitigation Strategies

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

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