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

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Microsoft Microsoft Malware Protection Engine affected
Version Status Constraints
1.1.0.0 affected < 1.1.26060.3008

No data.

No data.

No data.

Project Subscriptions

Vendors Products
Microsoft Subscribe
Malware Protection Engine Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55012 cve-icon
History

Tue, 14 Jul 2026 17:15:00 +0000

Type Values Removed Values Added
Description Integer overflow or wraparound in Microsoft Defender allows an unauthorized attacker to execute code locally.
Title Microsoft Defender Remote Code Execution Vulnerability
First Time appeared Microsoft
Microsoft malware Protection Engine
Weaknesses CWE-122
CWE-190
CPEs cpe:2.3:a:microsoft:malware_protection_engine:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft malware Protection Engine
References
Metrics cvssV3_1

{'score': 7.8, 'vector': '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-07-14T18:52:53.363Z

Reserved: 2026-06-16T14:12:44.283Z

Link: CVE-2026-55012

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses