Description
Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise | 16.0.1 – < https://aka.ms/OfficeSecurityReleases | https://aka.ms/OfficeSecurityReleases |
| Microsoft | Microsoft Excel 2016 | 16.0.0.0 – < 16.0.5535.1000 | 16.0.5535.1000 |
| Microsoft | Microsoft Office 2019 | 19.0.0 – < https://aka.ms/OfficeSecurityReleases | https://aka.ms/OfficeSecurityReleases |
| Microsoft | Microsoft Office LTSC 2021 | 16.0.1 – < https://aka.ms/OfficeSecurityReleases | https://aka.ms/OfficeSecurityReleases |
| Microsoft | Microsoft Office LTSC 2024 | 16.0.0 – < https://aka.ms/OfficeSecurityReleases | https://aka.ms/OfficeSecurityReleases |
| Microsoft | Microsoft Office LTSC for Mac 2021 | 16.0.1 – < 16.105.26011018 | 16.105.26011018 |
| Microsoft | Microsoft Office LTSC for Mac 2024 | 16.0.0 – < 16.105.26011018 | 16.105.26011018 |
| Microsoft | Office Online Server | 16.0.0.0 – < 16.0.10417.20083 | 16.0.10417.20083 |
Advisories 3
- WID-SEC-2026-0081 Microsoft Office Produkte: Mehrere Schwachstellen BSI CERT-Bund (WID) · Mar 22, 2026
- NCSC-2026-0010 Kwetsbaarheden verholpen in Microsoft Office NCSC-NL (Netherlands) · Mar 20, 2026
- MSRC-CVE-2026-20957 Microsoft Excel Remote Code Execution Vulnerability Microsoft Security Response Center · Jan 13, 2026
References
- Microsoft Excel Remote Code Execution Vulnerability vendor-advisory patch