CVE-2026-45498
Microsoft · Published May 20, 2026
7.5
CVSS v3.1
HIGHCISA KEV — Federal agencies must patch by deadline
Actively exploited in the wild
Patch availableGet patch
Description
Microsoft Defender Denial of Service Vulnerability
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