CVE-2026-45584
Analyzed Analyzed - Analysis Complete

Heap-based Buffer Overflow in Microsoft Defender

Publication date: 2026-05-20

Last updated on: 2026-05-20

Assigner: Microsoft Corporation

Description
Heap-based buffer overflow in Microsoft Defender allows an unauthorized attacker to execute code over a network.

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Meta Information

Published
2026-05-20
Last Modified
2026-05-20
Generated
2026-06-30
AI Q&A
2026-05-20
EPSS Evaluated
2026-06-28
NVD
CVE-2026-45584
EUVD
EUVD-2026-31105

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
microsoft malware_protection_engine From 1.1.26030.3008 (inc) to 1.1.26040.8 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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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

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Executive Summary

This vulnerability is a heap-based buffer overflow in Microsoft Defender. It allows an unauthorized attacker to execute code remotely over a network.

Impact Analysis

The vulnerability can lead to remote code execution by an attacker without any privileges or user interaction, potentially compromising the confidentiality, integrity, and availability of your system.

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