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CVE-2026-45498CISA KEV

Microsoft Defender Denial of Service Vulnerability

CISA lists this Microsoft vulnerability as known exploited. Its MSRC release detail is outside this installation's collected history.

CISA KEV Check MSRC

CISA catalog record

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

Product
Defender
Added to KEV
20 May 2026
Federal remediation due
3 Jun 2026
Known ransomware use
Not reported
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