CVE-2026-45498

Microsoft Defender Denial of Service Vulnerability

Published May 20, 2026 CVSS 3.1 · 4 Medium EPSS 63.1% KEV · Listed
Description
Microsoft Defender Denial of Service Vulnerability

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Weaknesses NVD-CWE-noinfo
Type Values Removed Values Added
First Time appeared Microsoft windows Defender Antimalware Platform
Vendors & Products Microsoft windows Defender Antimalware Platform
Type Values Removed Values Added
First Time appeared Microsoft defender Antimalware Platform
Weaknesses NVD-CWE-noinfo
CPEs cpe:2.3:a:microsoft:defender_antimalware_platform:*:*:*:*:*:*:*:*
Vendors & Products Microsoft defender Antimalware Platform
Type Values Removed Values Added
References
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'active', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Metrics kev

{'dateAdded': '2026-05-20T00:00:00+00:00', 'dueDate': '2026-06-03T00:00:00+00:00'}

Type Values Removed Values Added
Weaknesses CWE-400
Type Values Removed Values Added
Description Microsoft Defender Denial of Service Vulnerability
Title Microsoft Defender Denial of Service Vulnerability
First Time appeared Microsoft
Microsoft microsoft Defender
CPEs cpe:2.3:a:microsoft:microsoft_defender:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft microsoft Defender
References
Metrics cvssV3_1

{'score': 4, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
microsoft
Published
Updated
Aug 10, 2026, 3:13 PM
Reserved
May 12, 2026, 4:07 PM
Status
Analyzed
Published
May 20, 2026, 1:16 PM
Modified
Jul 23, 2026, 12:10 PM