CVE-2026-97777: 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
Does an attacker need credentials or direct access to exploit this issue?
No privileges are required, and the attack vector is network-based. Exploitation does require user interaction.
Which Microsoft Office deployments should be included in triage?
The affected software list includes Microsoft 365 Apps for Enterprise, Microsoft Office Excel, Microsoft Office LTSC 2024 for 32-bit editions, Microsoft Office 365 for Mac, Microsoft Office Online Server, Microsoft Office LTSC for Mac 2021, and Microsoft Office LTSC 2021 for both 32-bit and 64-bit editions.