CVE-2026-45498KEVEXPLOITEDPATCHED

microsoft · microsoft defender antimalware platform

Microsoft Defender Denial of Service Vulnerability

Description

Affected Products

Vendor	Product	Versions
microsoft	microsoft defender antimalware platform	-

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45498(vendor-advisory, patch)

Related News (1 articles)

Tier C

VulDB5h ago

CVE-2026-45498 | Microsoft Defender Antimalware Platform denial of service

→ No new info (linked only)

CVSS 3.14.0 MEDIUM

VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C

CISA KEV✅ Yes

Actively exploited✅ Yes

Patch available

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45498

PublishedMay 20, 2026

Last enriched5h agov2

Trending Score105🔥

Source articles1

Independent1

Info Completeness9/14

Missing: epss, cwe, exploit, iocs, mitre_attack

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Verification

State: unverified

Confidence: 0%

Vulnerability Timeline

CVE Published

May 20, 2026

Added to CISA KEV

May 20, 2026

Discovered by ZDM

May 20, 2026

Updated: description

May 20, 2026

Actively Exploited

May 20, 2026

Patch Available

May 20, 2026

Version History

Last enriched 5h ago

v2Tier C5h ago

Updated description with more technical detail and corrected exploit availability to false.

description

via VulDB

v15h ago

Initial creation