CVE-2026-45474

Analyzed Analyzed - Analysis Complete

Heap-based Buffer Overflow in Microsoft Office

Publication date: 2026-06-09

Last updated on: 2026-06-19

Assigner: Microsoft Corporation

Description

Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-06-09

Last Modified

2026-06-19

Generated

2026-06-30

AI Q&A

2026-06-10

EPSS Evaluated

2026-06-28

NVD

CVE-2026-45474

EUVD

EUVD-2026-35650

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	office	*

Helpful Resources

Exploitability

CWE

KEV

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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Attack-Flow Graph

Compliance Impact

This vulnerability allows an unauthorized attacker to execute code locally via a heap-based buffer overflow in Microsoft Office.

Such unauthorized code execution can lead to compromise of sensitive data, which may impact compliance with data protection regulations like GDPR and HIPAA by risking confidentiality, integrity, and availability of protected information.

Organizations using affected Microsoft Office versions should consider this vulnerability a critical risk to their security posture and compliance obligations.

Executive Summary

This vulnerability is a heap-based buffer overflow in Microsoft Office.

It allows an unauthorized attacker to execute code locally on the affected system.

Impact Analysis

The vulnerability can lead to remote code execution, allowing an attacker to run arbitrary code on your system.

This can result in full compromise of confidentiality, integrity, and availability of your data and system.

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