medium5.5
CVE-2026-55057
Integer overflow or wraparound in Microsoft Office allows an unauthorized attacker to disclose information locally.
Impact
Integer overflow or wraparound in Microsoft Office allows an unauthorized attacker to disclose information locally.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Microsoft | 365 Apps | All versions |
| Microsoft | Microsoft 365 | All versions |
| Microsoft | Office 2016 | All versions |
| Microsoft | Office 2019 | All versions |
| Microsoft | Office 2021 | All versions |
| Microsoft | Office 2024 | All versions |
| Microsoft | Microsoft 365 Apps For Enterprise | from 16.0.1 before https://aka.ms/OfficeSecurityReleases |
| Microsoft | Microsoft Office 2016 | from 16.0.0 before 16.0.5561.1000 |
| Microsoft | Microsoft Office 2019 | from 19.0.0 before https://aka.ms/OfficeSecurityReleases |
| Microsoft | Microsoft Office 365 For Mac | from 1.0.0 before 16.111.26071215 |
| 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 Office LTSC For Mac 2021 | from 16.0.1 before 16.111.26071215 |
| Microsoft | Microsoft Office LTSC For Mac 2024 | from 16.0.0 before 16.111.26071215 |