8.4
High
CVE-2026-20953 Use after free in Microsoft Office allows an unauthorized attacker to execute code locally
Description
Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Microsoft Office 2019 19.0 | 19.0.0 → latest | No fix stated |
| Microsoft 365 Apps for Enterprise 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 2021 16.0 | 16.0.1 → latest | No fix stated |
| Microsoft Office LTSC for Mac 2021 16.0 | 16.0.1 → < 16.105.26011018 | 16.105.26011018 |
| Microsoft Office LTSC for Mac 2024 16.0 | 16.0.0 → < 16.105.26011018 | 16.105.26011018 |
| Microsoft Office 2016 16.0 | 16.0.0 → < 16.0.5535.1000 | 16.0.5535.1000 |
Other CVEs of Microsoft Office 2019
The 696 CVEs of Microsoft Office 2019 →
CVE-2026-62804
External control of file name or path in Microsoft Office Word allows an unauthorized attacker to execute code locally
7.8
High
CVE-2026-85875
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally
5.5
Medium
CVE-2026-83949
Buffer over-read in Microsoft Office Word allows an unauthorized attacker to disclose information locally
5.5
Medium
CVE-2026-83951
Buffer over-read in Microsoft Office Word allows an unauthorized attacker to disclose information locally
5.5
Medium