CVE-2026-78512 HIGH

CVE-2026-78512: Microsoft Office Word Remote Code Execution Vulnerability

Vendor Microsoft
Product Microsoft 365 Apps for Enterprise
Weakness CWE-197
Published September 8, 2026
Last update September 9, 2026
View on NVD All CVEs

CVSS base score

8.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

What the vulnerability does

01Description

Numeric truncation error in Microsoft Office Word allows an unauthorized attacker to execute code over a network.

Key dates

02Disclosure timeline

September 8, 2026 CVE published
September 9, 2026 Record updated