CVE-2026-50408: Microsoft Excel Information Disclosure Vulnerability

Published Jul 14, 2026
·
Updated

Microsoft Excel Information Disclosure Vulnerability

Other sources

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

Microsoft

Affected Software

29 affected componentsFixes available
Microsoft Excel
Microsoft Office Online Server<16.0.10417.20175
16.0.10417.20175
Microsoft Office 2019 for 64-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 Office 365 for Mac<16.111.26071215
16.111.26071215
Microsoft Office 2019 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 Office LTSC 2024 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 Office LTSC for Mac 2021<16.111.26071215
16.111.26071215
Microsoft Excel 2016<16.0.5561.1001
16.0.5561.1001
Microsoft Office LTSC for Mac 2024<16.111.26071215
16.111.26071215
Microsoft Office LTSC 2024 for 64-bit editions<https://aka.ms/OfficeSecurityReleases
https://aka.ms/OfficeSecurityReleases
Microsoft Excel 2016<16.0.5561.1001
16.0.5561.1001
Microsoft 365 Apps
Microsoft 365 Apps
Microsoft Excel=2016
Microsoft Excel=2016
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

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
Description
CVE Published
via MITRE·05:08 PM
Data Sourced
via MITRE·05:08 PM
DescriptionSeverity
Data Sourced
via NVD·06:17 PM
RemedyDescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

1

What is the severity of CVE-2026-50408?

CVE-2026-50408 has a severity rating of medium with a score of 5.5.

2

How do I fix CVE-2026-50408?

CVE-2026-50408 can be fixed by applying the available patch from Microsoft.

3

What is the impact of CVE-2026-50408?

CVE-2026-50408 allows an unauthorized attacker to disclose information locally through an out-of-bounds read.

4

Which software is affected by CVE-2026-50408?

CVE-2026-50408 affects Microsoft Excel, Microsoft Office Online Server, and various versions of Microsoft 365 Apps.

5

When was CVE-2026-50408 published?

CVE-2026-50408 was published on July 14, 2026.

Contact

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