CVE-2026-45498
Microsoft Defender Denial of Service Vulnerability
Publication date: 2026-05-20
Last updated on: 2026-05-20
Assigner: Microsoft Corporation
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| microsoft | defender_antimalware_platform | From 4.18.26030.3011 (inc) to 4.18.26040.7 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-400 | The product does not properly control the allocation and maintenance of a limited resource. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
CVE-2026-45498 is a vulnerability in Microsoft Defender that can cause a Denial of Service (DoS). This means that an attacker could exploit this issue to disrupt the normal functioning of Microsoft Defender, potentially making it unavailable or unresponsive.
How can this vulnerability impact me? :
The impact of this vulnerability is a Denial of Service, which could result in Microsoft Defender being unable to perform its security functions properly. This could leave the system less protected against other threats during the period of disruption.
The severity of this vulnerability is rated as Low.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
This vulnerability is a Denial of Service issue in Microsoft Defender with a low severity impact and does not affect confidentiality or integrity.
Since it does not impact data confidentiality or integrity, it is unlikely to directly affect compliance with standards such as GDPR or HIPAA, which primarily focus on protecting personal and sensitive data.