CVE-2026-97756: 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 16.0.17932.21056 - 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 16.0.14334.20974 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.10417.20228Patch KB5002928
Event History
Frequently Asked Questions
Which deployments are identified as affected?
The affected software list includes Microsoft 365 Apps for Enterprise, Microsoft Office Excel, Microsoft Office LTSC 2021 and 2024 for 32-bit editions, Microsoft Office LTSC 2024 for 64-bit editions, Microsoft Office LTSC for Mac 2024, Microsoft Office 365 for Mac, and Microsoft Office Online Server.
What does an attacker need to exploit this issue?
The vector is network-based and the attacker does not need prior privileges. User interaction is required, so exploitation depends on a user taking an action involving attacker-supplied content.
What is the potential security impact if exploitation succeeds?
Successful exploitation can result in code execution. The supplied severity vector indicates high impact to confidentiality, integrity, and availability.