CVE-2026-55142: Microsoft Word Information Disclosure Vulnerability

Published Jul 14, 2026
·
Updated

Microsoft Word Information Disclosure Vulnerability

Other sources

Numeric truncation error in Microsoft Office Word allows an unauthorized attacker to disclose information locally.

Microsoft

Affected Software

28 affected componentsFixes available
Microsoft SharePoint Enterprise Server 2016<16.0.5561.1001
16.0.5561.1001
Microsoft Office 365 for Mac<16.111.26071215
16.111.26071215
Microsoft Word 2016<16.0.5561.1000
16.0.5561.1000
Microsoft Word 2016<16.0.5561.1000
16.0.5561.1000
Microsoft Office LTSC 2024 for 32-bit editions<https://aka.ms/OfficeSecurityReleases
https://aka.ms/OfficeSecurityReleases
Microsoft Office LTSC 2021 for 64-bit editions<https://aka.ms/OfficeSecurityReleases
https://aka.ms/OfficeSecurityReleases
Microsoft Office LTSC 2021 for 32-bit editions<https://aka.ms/OfficeSecurityReleases
https://aka.ms/OfficeSecurityReleases
Microsoft 365 Apps for Enterprise<https://aka.ms/OfficeSecurityReleases
https://aka.ms/OfficeSecurityReleases
Microsoft SharePoint Server Subscription Edition<16.0.19725.20434
16.0.19725.20434
Microsoft Office LTSC 2024 for 64-bit editions<https://aka.ms/OfficeSecurityReleases
https://aka.ms/OfficeSecurityReleases
Microsoft Office 2019 for 64-bit editions<https://aka.ms/OfficeSecurityReleases
https://aka.ms/OfficeSecurityReleases
Microsoft SharePoint Server 2019<16.0.10417.20175
16.0.10417.20175
Microsoft 365 Apps for Enterprise<https://aka.ms/OfficeSecurityReleases
https://aka.ms/OfficeSecurityReleases
Microsoft Office 2019 for 32-bit editions<https://aka.ms/OfficeSecurityReleases
https://aka.ms/OfficeSecurityReleases
Microsoft 365 Apps
Microsoft 365 Apps
Microsoft Microsoft 365 Macos
Microsoft Office 2019
Microsoft Office 2019
Microsoft Office 2021
Microsoft Office 2021
Microsoft Office 2024
Microsoft Office 2024
Microsoft SharePoint Server<16.0.19725.20434
Microsoft SharePoint Server=2016
Microsoft SharePoint Server=2019
Microsoft Word=2016
Microsoft Word=2016

Event History

Jul 14, 2026
CVE Published
via Microsoft·02:00 PM
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeakness
Data Sourced
via Microsoft·02:00 PM
Affected Software
Updated
via Microsoft·02:00 PM
Affected Software
Updated
via Microsoft·02:00 PM
Description
CVE Published
via MITRE·05:09 PM
Data Sourced
via MITRE·05:09 PM
DescriptionSeverity
Data Sourced
via NVD·06:18 PM
RemedyDescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2026-55142?

CVE-2026-55142 has a medium severity rating of 5.5.

2

How do I fix CVE-2026-55142?

To fix CVE-2026-55142, apply the available patch for Microsoft Word or the affected Microsoft products.

3

What types of software are affected by CVE-2026-55142?

CVE-2026-55142 affects Microsoft SharePoint Server, Microsoft Word 2016, Microsoft 365 Apps for Enterprise, and other Microsoft Office versions.

4

What type of vulnerability is identified in CVE-2026-55142?

CVE-2026-55142 is an information disclosure vulnerability caused by a numeric truncation error.

5

Can CVE-2026-55142 result in data loss?

CVE-2026-55142 does not result in data loss but may allow unauthorized data disclosure locally.

Contact

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