CVE-2026-55124: Microsoft Word Information Disclosure Vulnerability
Published Jul 14, 2026
·Updated
Improper validation of specified type of input in Microsoft Office Word allows an unauthorized attacker to disclose information locally.
Other sources
Microsoft Word Information Disclosure Vulnerability
— Microsoft
Affected Software
33 affected componentsFixes available
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 2019 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 SharePoint Server Subscription Edition<16.0.19725.20434
16.0.19725.20434
Microsoft SharePoint Enterprise Server 2016<16.0.5561.1001
16.0.5561.1001
Microsoft SharePoint Server 2019<16.0.10417.20175
16.0.10417.20175
Microsoft Office 365 for Mac<16.111.26071215
16.111.26071215
Microsoft Office LTSC for Mac 2024<16.111.26071215
16.111.26071215
Microsoft Word 2016<16.0.5561.1000
16.0.5561.1000
Microsoft Office LTSC 2024 for 64-bit editions<https://aka.ms/OfficeSecurityReleases
https://aka.ms/OfficeSecurityReleases
Microsoft Office 2019 for 32-bit editions<https://aka.ms/OfficeSecurityReleases
https://aka.ms/OfficeSecurityReleases
Microsoft Office LTSC for Mac 2021<16.111.26071215
16.111.26071215
Microsoft Word 2016<16.0.5561.1000
16.0.5561.1000
Microsoft 365 Apps for Enterprise<https://aka.ms/OfficeSecurityReleases
https://aka.ms/OfficeSecurityReleases
Microsoft 365 Apps for Enterprise<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 2021 Macos
Microsoft Office 2024
Microsoft Office 2024
Microsoft Office 2024 Macos
Microsoft Office Online Server<16.0.10417.20175
Microsoft SharePoint Server<16.0.19725.20434
Microsoft SharePoint Server=2016
Microsoft SharePoint Server=2019
Microsoft Word=2016
Microsoft Word=2016
Remediation
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
DescriptionWeakness
CVE Published
via MITRE·05:08 PM
Data Sourced
via MITRE·05:08 PM
DescriptionSeverity
Data Sourced
via NVD·06:18 PM
RemedyDescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
What is the severity of CVE-2026-55124?
CVE-2026-55124 has a medium severity rating of 5.5.
2
How do I fix CVE-2026-55124?
To fix CVE-2026-55124, apply the latest patch available from Microsoft.
3
What software is affected by CVE-2026-55124?
CVE-2026-55124 affects Microsoft SharePoint Server, Microsoft Word 2016, Microsoft 365 Apps for Enterprise, Microsoft Office 2019, Microsoft Office 2021, and Microsoft Office 2024.
4
What type of vulnerability is CVE-2026-55124?
CVE-2026-55124 is an information disclosure vulnerability caused by improper input validation in Microsoft Word.
5
What is the potential impact of CVE-2026-55124?
The potential impact of CVE-2026-55124 is unauthorized information disclosure locally.