CVE-2026-100210: Microsoft Office Excel Remote Code Execution Vulnerability
Published Oct 13, 2026
·Updated
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Other sources
Microsoft Office Excel Remote Code Execution Vulnerability
— Microsoft
Affected Software
11 affected componentsFixes available
Microsoft Microsoft Office Excel
Microsoft Office LTSC 2021 for 32-bit editions<16.0.14334.20974
16.0.14334.20974
Microsoft Office LTSC 2021 for 64-bit editions<16.0.14334.20974
16.0.14334.20974
Microsoft Office Online Server<16.0.10417.20228
16.0.10417.20228
Microsoft Office LTSC 2024 for 32-bit editions<16.0.17932.21056
16.0.17932.21056
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 for Mac 2024
Microsoft Office LTSC for Mac 2021
Microsoft 365 Apps for Enterprise<https://aka.ms/OfficeSecurityReleases
https://aka.ms/OfficeSecurityReleases
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 16.0.14334.20974 - 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 16.0.10417.20228Patch KB5002928 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in https://aka.ms/OfficeSecurityReleases
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