Microsoft Microsoft Defender Antimalware Platform

CVE-2026-45498
MEDIUM 4.0CISA KEV ↗Exploited per ENISA since 2026-05-20

At a glance

Source
NVD
EPSS
EPSS 63.08 % · percentile 99 ()
State
PUBLISHED
Published
Updated
Assigner
microsoft
NVD status
Analyzed

Description

Microsoft Defender Denial of Service Vulnerability

Weaknesses (CWE)

  • CWE-400 — Uncontrolled Resource Consumption

References

Scores

VersionScoreVectorScored by
CVSS 3.1MEDIUM 4.0CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:Cmicrosoft
CVSS 3.1MEDIUM 4.0CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:LNVD · secure@microsoft.com (Secondary)
CVSS 3.1HIGH 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HNVD · nvd@nist.gov (Primary)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Microsoft · Microsoft Defender Antimalware Platformaffected 4.0.0.0 < 4.18.26040.7

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
CISA Known Exploited VulnerabilitiesCC0 1.0
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD