CVE-2026-100210: Microsoft Office Excel Remote Code Execution Vulnerability
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
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 16.0.10417.20228Patch KB5002928 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.114.26101123 - 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 16.0.14334.20974
Event History
Frequently Asked Questions
What does an attacker need to exploit this vulnerability?
The attacker does not need prior authorization and can exploit the issue over a network. Exploitation requires user interaction, as reflected by the UI:R vector.
What is the potential impact if exploitation succeeds?
Successful exploitation can allow code execution and has high impacts on confidentiality, integrity, and availability. The affected weakness is a heap-based buffer overflow.
Which deployments should be reviewed for exposure?
Review Microsoft 365 Apps for Enterprise, Microsoft Office Excel, Office LTSC 2021 and 2024 in both 32-bit and 64-bit editions, Office Online Server, and Office 365 for Mac. The provided data does not distinguish affected versions or configurations within those products.