Cyber Posture

CVE-2026-45584

High
Microsoft: affectedMSmacOS: not affectedMacLinux: not affectedLnxMobile: not affectedMobNetwork: not affectedNetApplication: not affectedAppOther: not affectedOth

Published: 20 May 2026

Published
20 May 2026
Modified
20 May 2026
KEV Added
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Patch
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CVSS Score 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score N/A
Risk Priority 16 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-45584 is a high-severity Heap-based Buffer Overflow (CWE-122) vulnerability in Microsoft Malware Protection Engine. Its CVSS base score is 8.1 (High).

Operationally, it is not currently listed in the CISA KEV catalog.

NVD Description

Heap-based buffer overflow in Microsoft Defender allows an unauthorized attacker to execute code over a network.

Deeper analysisAI

Automated synthesis unavailable for this CVE.

Details

CWE(s)
CWE-122

Affected Products

microsoft
malware protection engine
1.1.26030.3008 — 1.1.26040.8

References