Description
Integer overflow or wraparound in Microsoft Office Word allows an unauthorized attacker to execute code locally.
Severity (CVSS)
| Base score | 7.8 |
|---|---|
| Severity | High |
| Version | CVSS 3.1 |
| Vector | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C |
| Provided by | CNA |
Weaknesses
- CWE-190 — CWE-190: Integer Overflow or Wraparound
- CWE-122 — CWE-122: Heap-based Buffer Overflow
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise | 16.0.1 to <https://aka.ms/OfficeSecurityReleases |
| Microsoft | Microsoft Office 2019 | 19.0.0 to <https://aka.ms/OfficeSecurityReleases |
| Microsoft | Microsoft Office 365 for Mac | 1.0.0 to <16.111.26071215 |
| Microsoft | Microsoft Office LTSC 2021 | 16.0.1 to <https://aka.ms/OfficeSecurityReleases |
| Microsoft | Microsoft Office LTSC 2024 | 16.0.0 to <https://aka.ms/OfficeSecurityReleases |
| Microsoft | Microsoft Office LTSC for Mac 2021 | 16.0.1 to <16.111.26071215 |
| Microsoft | Microsoft Office LTSC for Mac 2024 | 16.0.0 to <16.111.26071215 |
| Microsoft | Microsoft SharePoint Enterprise Server 2016 | 16.0.0 to <16.0.5561.1001 |
| Microsoft | Microsoft SharePoint Server 2019 | 16.0.0 to <16.0.10417.20175 |
| Microsoft | Microsoft SharePoint Server Subscription Edition | 16.0.0 to <16.0.19725.20434 |
| Microsoft | Microsoft Word 2016 | 16.0.1 to <16.0.5561.1000 |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55033 (vendor-advisory patch)
Generated from the official CVE List on 15 Jul 2026 07:06 UTC.