CVE-2026-97758: 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 16.0.14334.20974 - 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
Event History
Frequently Asked Questions
Does exploitation require attacker authentication or local access?
No attacker privileges are required, and the attack vector is network-based. However, user interaction is required for exploitation.
Which Excel deployment types are listed as affected?
The affected software list includes Microsoft 365 Apps for Enterprise; Office LTSC 2024 for 32-bit and 64-bit editions; Office LTSC 2021 for 32-bit and 64-bit editions; Office LTSC for Mac 2021; Microsoft Office 365 for Mac; and Microsoft Office Online Server.
What could a successful exploit allow?
A successful heap-based buffer overflow exploit could allow code execution. The supplied CVSS metrics rate confidentiality, integrity, and availability impact as high.