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CVE-2026-45498

KEV

Microsoft Defender Denial of Service Vulnerability

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Vendor / Project
Microsoft
Product
Defender
Date added
May 20, 2026
Due date
Jun 3, 2026
Known ransomware use
Unknown
CWEs
—

Description

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

Required 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.

Notes