CVE-2026-45584— Microsoft Defender Remote Code Execution Vulnerability
Affected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Microsoft | Microsoft Malware Protection Engine | 1.1.0.0< 1.1.26040.8 | affected |
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I. Basic Information for CVE-2026-45584
Vulnerability Information
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Vulnerability Title
Microsoft Defender Remote Code Execution Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
Heap-based buffer overflow in Microsoft Defender allows an unauthorized attacker to execute code over a network.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
堆缓冲区溢出
Source: NVD (National Vulnerability Database)
Vulnerability Title
Microsoft Defender 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Defender是美国微软（Microsoft）公司的一款威胁防护软件。 Microsoft Defender存在安全漏洞，该漏洞源于堆缓冲区溢出，未经授权的攻击者可能通过网络执行代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Microsoft | Microsoft Malware Protection Engine | 1.1.0.0 ~ 1.1.26040.8 | - |
II. Public POCs for CVE-2026-45584
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-45584 (1)
Same Patch Batch · Microsoft · 2026-05-20 · 4 CVEs total
| CVE-2026-42834 | 7.8 HIGH | Windows Admin Center in Azure Portal Elevation of Privilege Vulnerability |
| CVE-2026-41091 | 7.8 HIGH | Microsoft Defender Elevation of Privilege Vulnerability |
| CVE-2026-45498 | 4.0 MEDIUM | Microsoft Defender Denial of Service Vulnerability |
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Microsoft Defender Elevation of Privilege Vulnerability - CVE-2022-37971
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V. Comments for CVE-2026-45584
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