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Microsoft Defender CVE-2026-45498

| EUVD-2026-31102 MEDIUM
Uncontrolled Resource Consumption (CWE-400)
2026-05-20 microsoft GHSA-8gp3-pghr-6wxp
4.0
CVSS 3.1
Temporal: 3.5
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CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

Lifecycle Timeline

2
Added to CISA KEV
May 20, 2026 - 17:01 CISA
Analysis Generated
May 20, 2026 - 13:36 vuln.today

DescriptionNVD

Microsoft Defender Denial of Service Vulnerability

AnalysisAI

Denial of service in Microsoft Defender Antimalware Platform allows a local, unprivileged attacker to partially degrade availability with low attack complexity and no user interaction required. The CVSS 4.0 score reflects limited impact - confidentiality and integrity are unaffected, and availability impact is rated Low. …

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CVE-2026-45498 vulnerability details – vuln.today

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