CVE-2026-97757: 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 16.0.10417.20228Patch KB5002928 - 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 do to exploit this vulnerability?
The attacker must induce a user to interact with malicious content. The issue is remotely exploitable over the network, requires no prior privileges, and has low attack complexity.
Which environments and deployments should be prioritized for review?
Prioritize systems using Microsoft 365 Apps for Enterprise, Microsoft Office Excel, Office LTSC 2021 or 2024 editions listed as affected, and Microsoft Office Online Server. The affected list includes both 32-bit and 64-bit Office LTSC 2024 editions and Office LTSC for Mac 2021 and 2024.
What is the potential impact if exploitation succeeds?
Successful exploitation can allow code execution with high impact to confidentiality, integrity, and availability. The underlying flaw is a heap-based buffer overflow.