CVE-2026-21537
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Code Injection in Microsoft Defender for Linux Enables Remote Execution

Publication date: 2026-02-10

Last updated on: 2026-02-11

Assigner: Microsoft Corporation

Description
Improper control of generation of code ('code injection') in Microsoft Defender for Linux allows an unauthorized attacker to execute code over an adjacent network.

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Meta Information

Published
2026-02-10
Last Modified
2026-02-11
Generated
2026-07-06
AI Q&A
2026-02-10
EPSS Evaluated
2026-07-05
NVD
CVE-2026-21537
EUVD
EUVD-2026-7336

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
microsoft defender_for_endpoint *

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-94 The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

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Executive Summary

This vulnerability is an improper control of code generation, also known as code injection, in Microsoft Defender for Linux. It allows an unauthorized attacker to execute arbitrary code over an adjacent network.

Impact Analysis

The vulnerability can have a severe impact as it allows an attacker to execute code remotely without any user interaction or privileges. This can lead to complete compromise of the affected system, including full confidentiality, integrity, and availability loss.

Compliance Impact

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Detection Guidance

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