CVE-2026-45584
Undergoing Analysis
Undergoing Analysis - In Progress
Heap-based Buffer Overflow in Microsoft Defender
Publication date: 2026-05-20
Last updated on: 2026-05-20
Assigner: Microsoft Corporation
Description
Description
Heap-based buffer overflow in Microsoft Defender allows an unauthorized attacker to execute code over a network.
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| microsoft | malware_protection_engine | From 1.1.26030.3008 (inc) to 1.1.26040.8 (exc) |
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
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a heap-based buffer overflow in Microsoft Defender. It allows an unauthorized attacker to execute code remotely over a network.
How can this vulnerability impact me? :
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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