CVE-2026-26112: Microsoft Excel Remote Code Execution Vulnerability
Published Mar 10, 2026
·Updated
Microsoft Excel Remote Code Execution Vulnerability
Other sources
Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
— Microsoft
Affected Software
26 affected componentsFixes available
Microsoft Office LTSC for Mac 2024
Microsoft Excel 2016
Microsoft Excel 2016
Microsoft Office LTSC 2024 for 32-bit editions
Microsoft Office LTSC 2021 for 32-bit editions
Microsoft Office LTSC for Mac 2021
Microsoft Office 2019 for 32-bit editions
Microsoft 365 Apps for Enterprise
Microsoft Office 2019 for 64-bit editions
Microsoft 365 Apps for Enterprise
Microsoft Office LTSC 2021 for 64-bit editions
Microsoft Office LTSC 2024 for 64-bit editions
Microsoft Office Online Server
Microsoft 365 Apps
Microsoft 365 Apps
Microsoft Excel=2016
Microsoft Excel=2016
Microsoft Office=2019
Microsoft Office=2019
Microsoft Office Long Term Servicing Channel=2021
Microsoft Office Long Term Servicing Channel=2021
Microsoft Office Long Term Servicing Channel Macos=2021
Microsoft Office Long Term Servicing Channel=2024
Microsoft Office Long Term Servicing Channel=2024
Microsoft Office Long Term Servicing Channel Macos=2024
Microsoft Office Online Server<16.0.10417.20102
Event History
Mar 10, 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·05:05 PM
Data Sourced
via MITRE·05:05 PM
DescriptionSeverity
Data Sourced
via NVD·06:18 PM
DescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
What is the severity of CVE-2026-26112?
CVE-2026-26112 is classified as a critical remote code execution vulnerability in Microsoft Excel.
2
How do I fix CVE-2026-26112?
To fix CVE-2026-26112, ensure that you apply the latest security updates provided by Microsoft for affected products.
3
Which versions of Microsoft Excel are affected by CVE-2026-26112?
CVE-2026-26112 affects several versions of Microsoft Excel, including Excel 2016, Office LTSC, and the Office for Mac series.
4
Can CVE-2026-26112 allow an attacker to execute any arbitrary code?
Yes, CVE-2026-26112 allows an unauthorized attacker to execute arbitrary code on the affected system.
5
Is there a specific patch available for CVE-2026-26112?
Yes, Microsoft has released specific patches for CVE-2026-26112, which should be installed to mitigate the vulnerability.