CVE-2026-97746: Microsoft Office Excel Remote Code Execution Vulnerability
Integer underflow (wrap or wraparound) 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 16.0.14334.20974 - 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 https://aka.ms/OfficeSecurityReleases
Event History
Frequently Asked Questions
What does an attacker need to exploit this vulnerability?
The attacker can be unauthorized and exploit it over a network, but user interaction is required. The provided data does not specify the exact interaction or delivery method.
Which environments should be reviewed for exposure?
Review deployments of Microsoft 365 Apps for Enterprise, Microsoft Office Excel, Office LTSC 2021 and 2024 for Mac, Office LTSC 2021 for 32-bit and 64-bit editions, Microsoft Office Online Server, and Microsoft Office 365 for Mac.
What is the potential impact of successful exploitation?
Successful exploitation may allow code execution with high impacts to confidentiality, integrity, and availability. The vulnerability is rated high severity with a CVSS score of 8.8.