CVE-2026-63530: Microsoft Office Word Information Disclosure Vulnerability

Published Aug 11, 2026
·
Updated

Microsoft Office Word Information Disclosure Vulnerability

Other sources

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

— Microsoft

Affected Software

26 affected componentsFixes available
Microsoft Word 2016<16.0.5565.1000
16.0.5565.1000
Microsoft Office 365 for Mac<16.112.26081010
16.112.26081010
Microsoft Office LTSC 2024 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 Word 2016<16.0.5565.1000
16.0.5565.1000
Microsoft 365 Apps for Enterprise<https://aka.ms/OfficeSecurityReleases
https://aka.ms/OfficeSecurityReleases
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 for Mac 2024<16.112.26081010
16.112.26081010
Microsoft Office LTSC for Mac 2021<16.112.26081010
16.112.26081010
Microsoft Office 2019 for 64-bit editions<https://aka.ms/OfficeSecurityReleases
https://aka.ms/OfficeSecurityReleases
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 2021 Macos
Microsoft Office 2024
Microsoft Office 2024
Microsoft Office 2024 Macos
Microsoft Word=2016
Microsoft Word=2016

Remediation

Patch Available

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-63530

Event History

Aug 11, 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·05:06 PM
Data Sourced
via MITRE·05:06 PM
DescriptionSeverity
Data Sourced
via NVD·05:18 PM
RemedyDescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2026-63530?

The severity of CVE-2026-63530 is classified as medium with a score of 5.5.

2

What does CVE-2026-63530 affect?

CVE-2026-63530 affects Microsoft Office products including Word 2016, Microsoft 365 Apps, Office 2019, Office 2021, Office 2024, and Office 365 for Mac.

3

How do I fix CVE-2026-63530?

To fix CVE-2026-63530, you need to apply the available patch released by Microsoft.

4

What type of vulnerability is CVE-2026-63530?

CVE-2026-63530 is an information disclosure vulnerability caused by an out-of-bounds read in Microsoft Office Word.

5

Can CVE-2026-63530 be exploited remotely?

CVE-2026-63530 requires user interaction, making it less likely to be exploited remotely without user consent.

Company

Resources

Contact

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