CVE-2026-45458
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
CVE-2026-45458
EUVD
EUVD-2026-35669
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
microsoft office *
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-416 The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
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Compliance Impact

The vulnerability allows an unauthorized attacker to execute code locally through type confusion in Microsoft Office, which could lead to unauthorized access or manipulation of sensitive data.

Such unauthorized access and potential data compromise may impact compliance with standards and regulations like GDPR and HIPAA, which require protection of personal and sensitive information.

However, specific effects on compliance are not detailed in the provided information.

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 local code execution by an unauthorized attacker, which means the attacker could run malicious code on your system without permission. This can compromise the confidentiality, integrity, and availability of your data and system.

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