CVE-2026-45475

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:
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Meta Information

Published

2026-06-09

Last Modified

2026-06-19

Generated

2026-06-30

AI Q&A

2026-06-09

EPSS Evaluated

2026-06-28

NVD

CVE-2026-45475

EUVD

EUVD-2026-35647

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	office	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-122	A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

Attack-Flow Graph

Impact Analysis

An attacker exploiting this vulnerability can execute arbitrary code on your system with local access, potentially leading to full compromise of confidentiality, integrity, and availability of your data and system.

Executive Summary

This vulnerability is a heap-based buffer overflow in Microsoft Office that allows an unauthorized attacker to execute code locally on the affected 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.

Additionally, limiting local user privileges and avoiding opening untrusted Office documents can reduce the risk of exploitation.

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