CVE-2026-55012

HIGH

Microsoft Defender Remote Code Execution Vulnerability

Title source: cna
STIX 2.1

Description

Integer overflow or wraparound in Microsoft Defender allows an unauthorized attacker to execute code locally.

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory patch
Microsoft Defender Remote Code Execution Vulnerability
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55012

Scores

CVSS v3 7.8
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Details

CWE
CWE-122 CWE-190
Status published
Products (1)
Microsoft/Microsoft Malware Protection Engine 1.1.0.0 - 1.1.26060.3008
Published Jul 14, 2026
Tracked Since Jul 14, 2026