5.5
Medium
CVE-2026-55057 Integer overflow or wraparound in Microsoft Office allows an unauthorized attacker to disclose information locally
Description
Integer overflow or wraparound in Microsoft Office allows an unauthorized attacker to disclose information 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 Office 2016 16.0 | 16.0.0 → < 16.0.5561.1000 | 16.0.5561.1000 |
| Microsoft Office 2019 19.0 | 19.0.0 → latest | No fix stated |
| Microsoft Office 365 for Mac 1.0 | 1.0.0 → < 16.111.26071215 | 16.111.26071215 |
| 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 → < 16.111.26071215 | 16.111.26071215 |
| Microsoft Office LTSC for Mac 2024 16.0 | 16.0.0 → < 16.111.26071215 | 16.111.26071215 |
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