| CVE Number | Vulnerability | Product | Severity | Date |
|---|---|---|---|---|
| CVE-2026-78510 | Microsoft Office Remote Code Execution Vulnerability | Microsoft Office, Microsoft 365 | Critical | 15-10-2026 |
Technical Information
An unauthenticated attacker could craft and send a malicious RTF file that exploits a heap-based buffer overflow vulnerability in Microsoft Outlook and Word, enabling remote code execution with the privileges of the targeted user when the file is opened or rendered in the preview pane.
Patch release date: Sep 08, 2026
Further information on this vulnerability is available at : CVE-2026-78510
Affected Software
Microsoft Office 2019 for 32-bit editions,Microsoft Office 2019 for 64-bit editions,
Microsoft 365 Apps for Enterprise for 32-bit Systems,
Microsoft 365 Apps for Enterprise for 64-bit Systems,
Microsoft Office LTSC for Mac 2021,
Microsoft Office LTSC 2021 for 64-bit editions,
Microsoft Office LTSC 2021 for 32-bit editions,
Microsoft Office LTSC 2024 for 32-bit editions,
Microsoft Office LTSC 2024 for 64-bit editions,
Microsoft Office LTSC for Mac 2024,
Microsoft Office 2016 (32-bit edition),
Microsoft Office 2016 (64-bit edition),
Microsoft Office 365 for Mac