CVE-2026-55043: Microsoft PowerPoint Remote Code Execution Vulnerability

Published Jul 14, 2026
·
Updated

Heap-based buffer overflow in Microsoft Office PowerPoint allows an unauthorized attacker to execute code locally.

Other sources

Microsoft PowerPoint Remote Code Execution Vulnerability

— Microsoft

Affected Software

26 affected componentsFixes available
Microsoft PowerPoint 2016<16.0.5561.1000
16.0.5561.1000
Microsoft PowerPoint 2016<16.0.5561.1000
16.0.5561.1000
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 Office LTSC 2024 for 32-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 LTSC for Mac 2021<16.111.26071215
16.111.26071215
Microsoft Office LTSC 2021 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 365 Apps for Enterprise<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 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
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 PowerPoint=2016
Microsoft PowerPoint=2016

Remediation

Patch Available

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55043

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
Updated
via Microsoft·02:00 PM
DescriptionSeverity
CVE Published
via MITRE·05:09 PM
Data Sourced
via MITRE·05:09 PM
DescriptionSeverity
Data Sourced
via NVD·06:18 PM
RemedyDescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

1

What is the severity of CVE-2026-55043?

The severity of CVE-2026-55043 is classified as high with a score of 7.8.

2

What is CVE-2026-55043?

CVE-2026-55043 is a heap-based buffer overflow vulnerability in Microsoft PowerPoint that allows unauthorized attackers to execute code locally.

3

How do I fix CVE-2026-55043?

To fix CVE-2026-55043, ensure that you apply the latest patches provided by Microsoft for the affected versions of PowerPoint.

4

What are the affected versions for CVE-2026-55043?

CVE-2026-55043 affects Microsoft PowerPoint 2016, Microsoft 365 Apps for Enterprise, Microsoft Office 2019, Microsoft Office 2021, Microsoft Office 2024, and Microsoft Office LTSC for Mac 2024.

5

What attack vectors are associated with CVE-2026-55043?

CVE-2026-55043 can be exploited through local access, given its attack vector of AV:L.

Company

Resources

Contact

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