CVE-2026-97008: Microsoft Office Excel Remote Code Execution Vulnerability
Buffer underwrite ('buffer underflow') 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 https://aka.ms/OfficeSecurityReleases - 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 - 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
What must an attacker do to exploit this issue?
The attack vector is network-based and requires no attacker privileges, but it requires user interaction. The provided data does not specify the exact interaction or delivery method.
Which Microsoft Office deployments should be prioritized for review?
Review Microsoft 365 Apps for Enterprise, Microsoft Office Excel, Office LTSC 2021 and 2024 editions listed for Windows and Mac, Microsoft Office 365 for Mac, and Microsoft Office Online Server. The supplied information does not identify affected build numbers or state whether any default configuration is exempt.
What impact should incident responders assume if exploitation succeeds?
Successful exploitation permits code execution and is rated high severity with high impacts to confidentiality, integrity, and availability. Treat potentially exploited systems as subject to full compromise within the affected application's security context.