CVE-2026-97780: 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 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 16.0.17932.21056 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.14334.20974
Event History
Frequently Asked Questions
Which deployments are listed as affected?
The affected software list includes Microsoft 365 Apps for Enterprise; Microsoft Office Online Server; Office LTSC 2021 and 2024 for 32-bit and 64-bit editions; and Office LTSC for Mac 2021 and 2024.
What access and conditions does exploitation require?
The CVSS vector indicates an attacker can attack over the network with low attack complexity and no prior privileges. User interaction is required.
What is the potential security impact if exploitation succeeds?
The vulnerability is rated high severity with high impacts to confidentiality, integrity, and availability. Successful exploitation can result in code execution.