CVE-2026-97773: 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 16.0.17932.21056 - 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 attacker needs to reach a vulnerable Excel target over a network and have a user interact with the malicious content. No attacker privileges are required.
What is the potential impact if exploitation succeeds?
Successful exploitation can allow code execution and has high impacts on confidentiality, integrity, and availability.
Which deployments should be assessed?
Assess Microsoft 365 Apps for Enterprise, Microsoft Office Excel, Office LTSC for Mac 2024 and 2021, Office 365 for Mac, Office LTSC 2024 64-bit, Office LTSC 2021 32-bit, and Microsoft Office Online Server.