CVE-2026-45584

Published May 20, 2026

Last updated 7 hours ago

Overview

Description
Heap-based buffer overflow in Microsoft Defender allows an unauthorized attacker to execute code over a network.
Source
secure@microsoft.com
NVD status
Analyzed
Products
malware_protection_engine

Risk scores

CVSS 3.1

Type
Primary
Base score
8.1
Impact score
5.9
Exploitability score
2.2
Vector string
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity
HIGH

Weaknesses

secure@microsoft.com
CWE-122

Social media

Hype score
Not currently trending

Configurations

References

Sources include official advisories and independent security research.