VDB
CVE-2026-56156
CVE-2026-56156
PUBLISHED
CVSS 7.8 HIGH
Reported by microsoft · Published July 14, 2026
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Risk Scores
CVSS 3.1
7.8
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
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise | 16.0.1 |
| Microsoft | Microsoft Office 365 for Mac | 1.0.0 |
| Microsoft | Microsoft Office LTSC 2021 | 16.0.1 |
| Microsoft | Microsoft Office LTSC 2024 | 16.0.0 |
| Microsoft | Microsoft Office LTSC for Mac 2021 | 16.0.1 |
| Microsoft | Microsoft Office LTSC for Mac 2024 | 16.0.0 |
| microsoft | 365_apps | 16.0.1, 16.0.1, 16.0.1 |
| Microsoft | Microsoft 365 Apps for Enterprise | 16.0.1, 16.0.1, 16.0.1 |
| microsoft | office_2024 | 16.0.0, 16.0.0, 16.0.0 |
| microsoft | office_365 | 1.0.0, 1.0.0, 1.0.0 |
| microsoft | office_macos_2024 | 16.0.0, 16.0.0, 16.0.0 |
| Microsoft | Microsoft Office LTSC 2024 | 16.0.0, 16.0.0, 16.0.0 |
| microsoft | office_2021 | 16.0.1, 16.0.1, 16.0.1 |
| Microsoft | Microsoft Office LTSC for Mac 2024 | 16.0.0, 16.0.0, 16.0.0 |
| Microsoft | Microsoft Office LTSC for Mac 2021 | 16.0.1, 16.0.1, 16.0.1 |
| Microsoft | Microsoft Office 365 for Mac | 1.0.0, 1.0.0, 1.0.0 |
| microsoft | office_macos_2021 | 16.0.1, 16.0.1, 16.0.1 |
| Microsoft | Microsoft Office LTSC 2021 | 16.0.1, 16.0.1, 16.0.1 |
Timeline
- Jul 14, 2026 CVE Published
- Jul 15, 2026 Coalition ESS Score
- Jul 15, 2026 Security Advisory
- Jul 15, 2026 CVE Updated
References
- Microsoft Excel Remote Code Execution Vulnerability vendor-advisorypatch