PT-2026-42161 · Microsoft · Defender Antimalware Platform

Published 2026-05-20 · Updated 2026-05-20 · CVE-2026-45498

Mitre

CVSS v3.1

4.0

Medium

Base vector

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

Microsoft Defender Denial of Service Vulnerability

Fix

DoS

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

CVE-2026-45498

Affected Products

Defender Antimalware Platform

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-45498 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-45498 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45498 · Vendor Advisory
• https://cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-45498 · Note