CVE-2026-45498— Microsoft Defender Denial of Service Vulnerability
In-the-Wild Activity Observed cisa_kev · confirmed
Possible ATT&CK Techniques 1AI
T1499 · Endpoint Denial of ServiceAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Microsoft | Microsoft Defender Antimalware Platform | - | affected |
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I. Basic Information for CVE-2026-45498
Vulnerability Information
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Vulnerability Title
Microsoft Defender Denial of Service Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
Microsoft Defender Denial of Service Vulnerability
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
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，该漏洞源于拒绝服务。
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 Defender Antimalware Platform | - | - |
II. Public POCs for CVE-2026-45498
| # | POC Description | Source Link | Shenlong Link |
|---|
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No public POC found.
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Advisory · 1
Same Patch Batch · Microsoft · 2026-05-20 · 4 CVEs total
| CVE-2026-45584 | 8.1 HIGH | Microsoft Defender Remote Code Execution Vulnerability |
| 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 |
IV. Related Vulnerabilities
Same vendor: Microsoft
- CVE-2026-42834
Windows Admin Center in Azure Portal Elevation of Privilege - CVE-2026-45584
Microsoft Defender Remote Code Execution Vulnerability - CVE-2026-41091
Microsoft Defender Elevation of Privilege Vulnerability - CVE-2026-45585
Windows BitLocker Security Feature Bypass Vulnerability - CVE-2026-42822
Azure Local Disconnected Operations (ALDO) Elevation of Priv
V. Comments for CVE-2026-45498
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