CVE-2026-45498

4.0 MEDIUM CISA KEV - Actively Exploited

Published: May 20, 2026 Modified: May 28, 2026

Description

Microsoft Defender Denial of Service Vulnerability

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

0.0 Low Medium High Critical 10.0

Vector String

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

Patch Vendor Advisory Exploit Third Party Advisory

Source: secure@microsoft.com

Vendor Advisory

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Third Party Advisory US Government Resource

2 reference(s) from NVD

CVSS v3 Score

4.0 / 10.0

EPSS (Exploit Probability)

4.7%

90th percentile

Exploitation Status

Actively Exploited

Remediation due: 2026-06-03

CWE-400

microsoft