high7.8
CVE-2026-55130
Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code locally.
Impact
Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code locally.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Microsoft | 365 Apps | All versions |
| Microsoft | Office 2019 | All versions |
| Microsoft | Office 2021 | All versions |
| Microsoft | Office 2024 | All versions |
| Microsoft | Sharepoint Server | before 16.0.19725.20434 Versions 2016, 2019 |
| Microsoft | Word | Version 2016 |
| Microsoft | Microsoft 365 Apps For Enterprise | from 16.0.1 before https://aka.ms/OfficeSecurityReleases |
| Microsoft | Microsoft Office 2019 | from 19.0.0 before https://aka.ms/OfficeSecurityReleases |
| Microsoft | Microsoft Office LTSC 2021 | from 16.0.1 before https://aka.ms/OfficeSecurityReleases |
| Microsoft | Microsoft Office LTSC 2024 | from 16.0.0 before https://aka.ms/OfficeSecurityReleases |
| Microsoft | Microsoft SharePoint Enterprise Server 2016 | from 16.0.0 before 16.0.5561.1001 |
| Microsoft | Microsoft SharePoint Server 2019 | from 16.0.0 before 16.0.10417.20175 |
| Microsoft | Microsoft SharePoint Server Subscription Edition | from 16.0.0 before 16.0.19725.20434 |
| Microsoft | Microsoft Word 2016 | from 16.0.1 before 16.0.5561.1000 |