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cve recordmediumexploited in the wild

CVE-2026-45498

Microsoft · Defender · Microsoft Defender Denial of Service Vulnerability

Published · Added to CISA KEV
CVSS4
Severitymedium
WeaknessCWE-400
ExploitedYes, in CISA KEV
Ransomware useUnknown
Federal fix dueJun 3, 2026

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Description

Microsoft Defender Denial of Service Vulnerability

Required action (CISA)

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

References

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