CVE-2026-100210
Microsoft Office Excel Remote Code Execution Vulnerability
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What happened?
See the source record for the publisher’s description.
Affected software and versions
| Software | Version information | Fixed version |
|---|---|---|
| Microsoft 365 Apps for EnterpriseMicrosoft | affected: 16.0.1 to < https://aka.ms/OfficeSecurityReleases | See vendor advisory |
| Microsoft Office 365 for MacMicrosoft | affected: 1.0.0 to < 16.114.26101123 | See vendor advisory |
| Microsoft Office LTSC 2021Microsoft | affected: 16.0.1 to < 16.0.14334.20974 | See vendor advisory |
| Microsoft Office LTSC 2024Microsoft | affected: 16.0.0 to < 16.0.17932.21056 | See vendor advisory |
| Microsoft Office LTSC for Mac 2021Microsoft | affected: 16.0.1 to < 16.114.26101123 | See vendor advisory |
| Microsoft Office LTSC for Mac 2024Microsoft | affected: 16.0.0 to < 16.114.26101123 | See vendor advisory |
| Office Online ServerMicrosoft | affected: 16.0.0.0 to < 16.0.10417.20228 | See vendor advisory |
Version information comes from the source record and can include unaffected products and exceptions. Distribution packages may contain backported fixes: an older upstream version alone does not prove a server is affected.
Is it being exploited?
This CVE was not listed in the CISA catalogue at our last retrieval. This does not establish that exploitation is absent.
How to respond
- Confirm the product, installed package version, and any configuration requirements in the vendor advisory.
- Follow the vendor’s remediation or workaround guidance in the references below. Structured fixed-version data is unavailable here; the publisher’s description may include a fix or workaround.
- Restart affected services if required, then verify the running version. Known exploitation may warrant investigation as well as patching.