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Posted on • Originally published at scyscan.com

CVE-2026-45498: Microsoft Defender Denial of Service Vulnerability

CVE ID

CVE-2026-45498

Vulnerability Name

Microsoft Defender Denial of Service Vulnerability

  • Project: Microsoft
  • Product: Defender

Date

  • Date Added: 2026-05-20
  • Due Date: 2026-06-03

Description

Microsoft Defender contains an unspecified vulnerability that allows for denial of service.

Known To Be Used in Ransomware Campaigns?

Unknown

Action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Additional Notes

https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-45498 ; https://nvd.nist.gov/vuln/detail/CVE-2026-45498

More CVEs Info

Common Vulnerabilities & Exposures (CVE) List

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