high7.8
CVE-2026-55136
Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Impact
Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Microsoft | 365 Apps | All versions |
| Microsoft | Excel | Version 2016 |
| Microsoft | Microsoft 365 | All versions |
| Microsoft | Office 2019 | All versions |
| Microsoft | Office 2021 | All versions |
| Microsoft | Office 2024 | All versions |
| Microsoft | Office Online Server | before 16.0.10417.20175 |
| Microsoft | Microsoft 365 Apps For Enterprise | from 16.0.1 before https://aka.ms/OfficeSecurityReleases |
| Microsoft | Microsoft Excel 2016 | from 16.0.0.0 before 16.0.5561.1001 |
| 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 |
| Microsoft | Office Online Server | from 16.0.0.0 before 16.0.10417.20175 |