CVE-2026-45498

medium · 4Actively exploited

On the CISA Known Exploited Vulnerabilities catalog

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Added 2026-05-20Remediation due 2026-06-03

Microsoft Defender Denial of Service Vulnerability

CVSS

63.1%

EPSS (exploit prob.)

99th

EPSS percentile

2026-05-20

Published

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Weaknesses

CWE-400

Affected products

Vendor	Product	Affected versions
microsoft	defender_antimalware_platform	< 4.18.26040.7

Check a specific version with /api/v1/cve/match.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45498
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-45498

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-45498