CVE-2026-70254: Microsoft Office Excel Remote Code Execution Vulnerability
Microsoft Office Excel Remote Code Execution Vulnerability
Other sources
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
— 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
Event History
Frequently Asked Questions
Does exploitation require an attacker to authenticate or have an account?
No. The vulnerability is rated with no privileges required and low attack complexity, but it does require user interaction.
Which Microsoft Office deployments are listed as affected?
The listed software includes Microsoft 365 Apps for Enterprise, Microsoft Office 365 for Mac, Microsoft Office LTSC 2021 for 32-bit and 64-bit editions, Microsoft Office LTSC 2024 for 32-bit and 64-bit editions, and Microsoft Office Excel.
What is the potential security impact if exploitation succeeds?
The severity vector indicates high impact to confidentiality, integrity, and availability. The scope is rated unchanged.