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CVE-2026-45498
CVE
High KEVConfirmedExploit available

Microsoft Defender Denial of Service Vulnerability

CVSS
7.5
High
EPSS
0.04
p88
Published
2026-01-01
Updated
2026-05-20
Description

Microsoft Defender Denial of Service Vulnerability

Tags · CWE
KEVPre-auth
CWE-400
CAPEC-147
CAPEC-227
CAPEC-492
Affected products
Defender_antimalware_platform < 4.18.26040.7
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Timeline
2026-01-01
Published
2026-05-20
Added to KEV
2026-05-20
Updated
CVSS 3.1 breakdown
Attack Vector
AV: N
Network (N)
Attack Complexity
AC: L
Low (L)
Privileges Required
PR: N
None (N)
User Interaction
UI: N
None (N)
Scope
S: U
Unchanged (U)
Confidentiality Impact
C: N
None (N)
Integrity Impact
I: N
None (N)
Availability Impact
A: H
High (H)
Exploit indicators
EPSS
0.041 · p88
Known exploited (KEV)
Yes
MITRE ATT&CK
Inferred via CAPEC
└ via CAPEC-227 · CWE-400
Known exploits — Сканер-ВС
CVE-2026-45498
cisa · https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Enterprise
Affected software
ProductVendorStatus
defender_antimalware_platform*Exploited