HIGHCVE-2026-40363Published Modified CNA microsoft
CVE-2026-40363: Microsoft Office Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
Metrics
- CVSS v3.1
- 8.4
- Severity
- HIGH
- Fixed in
- 16.0.5552.1000
- Affected Products
- 8
Fix available
16.0.5552.100016.0.19822.2019016.109.26051019https://aka.ms/OfficeSecurityReleases
Patch commits
Affected packages
- Microsoft / Microsoft 365 Apps for Enterprise< https://aka.ms/OfficeSecurityReleases (from 16.0.1)
- Microsoft / Microsoft Office 2016< 16.0.5552.1000 (from 16.0.0)
- Microsoft / Microsoft Office 2019< https://aka.ms/OfficeSecurityReleases (from 19.0.0)
- Microsoft / Microsoft Office for Android< 16.0.19822.20190 (from 16.0.1)
- Microsoft / Microsoft Office LTSC 2021< https://aka.ms/OfficeSecurityReleases (from 16.0.1)
- Microsoft / Microsoft Office LTSC 2024< https://aka.ms/OfficeSecurityReleases (from 16.0.0)
- Microsoft / Microsoft Office LTSC for Mac 2021< 16.109.26051019 (from 16.0.1)
- Microsoft / Microsoft Office LTSC for Mac 2024< 16.109.26051019 (from 16.0.0)
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C