CVE-2026-100212: Microsoft Office Excel Remote Code Execution Vulnerability
Published Oct 13, 2026
·Updated
Microsoft Office Excel Remote Code Execution Vulnerability
Other sources
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
— Microsoft
Affected Software
11 affected componentsFixes available
Microsoft Microsoft Excel
Microsoft Office LTSC for Mac 2021
Microsoft Office LTSC 2024 for 32-bit editions<16.0.17932.21056
16.0.17932.21056
Microsoft Office LTSC for Mac 2024
Microsoft Office Online Server<16.0.10417.20228
16.0.10417.20228
Microsoft 365 Apps for Enterprise<https://aka.ms/OfficeSecurityReleases
https://aka.ms/OfficeSecurityReleases
Microsoft Office LTSC 2024 for 64-bit editions<16.0.17932.21056
16.0.17932.21056
Microsoft 365 Apps for Enterprise<https://aka.ms/OfficeSecurityReleases
https://aka.ms/OfficeSecurityReleases
Microsoft Office 365 for Mac
Microsoft Office LTSC 2021 for 64-bit editions<16.0.14334.20974
16.0.14334.20974
Microsoft Office LTSC 2021 for 32-bit editions<16.0.14334.20974
16.0.14334.20974
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.17932.21056 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in https://aka.ms/OfficeSecurityReleases - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.10417.20228Patch KB5002928 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.14334.20974
Event History
Oct 13, 2026
CVE Published
via Microsoft·02:00 PM
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeaknessAffected Software
CVE Published
via MITRE·07:01 PM
Data Sourced
via MITRE·07:01 PM
DescriptionSeverity
Data Sourced
via NVD·07:17 PM
DescriptionSeverityWeakness