CVE-2026-45456
Undergoing Analysis Undergoing Analysis - In Progress
Type Confusion in Microsoft Office

Publication date: 2026-06-09

Last updated on: 2026-06-09

Assigner: Microsoft Corporation

Description
Access of resource using incompatible type ('type confusion') in Microsoft Office allows an unauthorized attacker to execute code locally.
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Meta Information
Published
2026-06-09
Last Modified
2026-06-09
Generated
2026-06-10
AI Q&A
2026-06-09
EPSS Evaluated
N/A
NVD
EUVD
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
microsoft office *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-843 The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.
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Executive Summary

This vulnerability is a type confusion issue in Microsoft Office where an attacker can access a resource using an incompatible type. This flaw allows an unauthorized attacker to execute code locally on the affected system.

Impact Analysis

The vulnerability can lead to remote code execution, enabling an attacker to run arbitrary code on your system without authorization. This can result in full compromise of confidentiality, integrity, and availability of your data and system.

Mitigation Strategies

To mitigate this vulnerability, it is recommended to apply the security updates provided by Microsoft for Microsoft Office as soon as they become available.

Since the vulnerability allows local code execution via type confusion, limiting user privileges and avoiding opening untrusted Office documents can reduce risk until patches are applied.

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