8.4
High
CVE-2026-26109 Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally
Description
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Microsoft 365 Apps for Enterprise 16.0 | 16.0.1 → latest | No fix stated |
| Microsoft Excel 2016 16.0 | 16.0.0.0 → < 16.0.5543.1000 | 16.0.5543.1000 |
| Microsoft Office 2019 19.0 | 19.0.0 → latest | No fix stated |
| Microsoft Office LTSC 2021 16.0 | 16.0.1 → latest | No fix stated |
| Microsoft Office LTSC 2024 16.0 | 16.0.0 → latest | No fix stated |
| Microsoft Office LTSC for Mac 2021 16.0 | 16.0.1 → < 16.107.26030819 | 16.107.26030819 |
| Microsoft Office LTSC for Mac 2024 16.0 | 16.0.0 → < 16.107.26030819 | 16.107.26030819 |
| Office Online Server 16.0 | 16.0.0.0 → < 16.0.10417.20102 | 16.0.10417.20102 |
References
- Microsoft Excel Remote Code Execution Vulnerability msrc.microsoft.com
Timeline
- Published
- Last modified
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