CVE-2026-45498

Wednesday, May 20, 2026

4

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

Summary

Microsoft Defender Denial of Service Vulnerability

Affected Software

Vendor	Product	Version Range	Status
Microsoft	Microsoft Defender Antimalware Platform	`4.0.0.0 < 4.18.26040.7`	affected

Weaknesses

CWE-400: CWE-400: Uncontrolled Resource Consumption

ADP Enrichment

CISA ADP Vulnrichment

SSVC:
Exploitation: active
- Automatable: no
- Technical Impact: partial

Additional References

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-45498

References

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

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