Microsoft Word Remote Code Execution Vulnerability
CVE-2026-45643

7.8HIGH

Key Information:

Vendor: Microsoft
Status: Microsoft 365 Apps For Enterprise; Microsoft Office 365 For Mac; Microsoft Office Ltsc 2021; Microsoft Office Ltsc 2024
Vendor: CVE Published:; 9 June 2026

What is CVE-2026-45643?

Untrusted pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code locally.

Microsoft 365 Apps for Enterprise 32-bit Systems 16.0.1

Microsoft Office 365 for Mac -

Microsoft Office LTSC 2021 32-bit Systems 16.0.1

Score:

7.8

Severity:

HIGH

Confidentiality:

High

Integrity:

High

Availability:

High

Attack Vector:

Local

Attack Complexity:

Low

Privileges Required:

None

User Interaction:

Required

Scope:

Unchanged

Download the Critical Vulnerability Management Cheat Sheet

CVE-2026-45643 Data