CVE-2026-45498
Microsoft Defender Denial of Service Vulnerability
7.5
CVSS 3.1
1.3 %
EPSS (current)
2026-05-20
KEV addition
No
Ransomware
Timeline
Publication, first public exploit and KEV addition on a day axis.
Key facts
Vendor / product: Microsoft / Defender
Published: 2026-05-20 · Due (CISA): 2026-06-03
CWE: CWE-400 · EU list: no
Exploit references (metadata only)
No public exploit references recorded.