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NVD Vulnerability Details :

CVE-2026-21537

Analyzed

Source-secure@microsoft.com

Published At-10 Feb, 2026 | 18:16

Updated At-11 Feb, 2026 | 21:50

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

Date Added	Due Date	Vulnerability Name	Required Action
	N/A

Metrics

Type	Version	Base score	Base severity	Vector
Primary	3.1	8.8	HIGH	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Type: Primary

Version: 3.1

Base score: 8.8

Base severity: HIGH

Vector:

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CPE Matches

Microsoft Corporation

>>defender_for_endpoint>>-

cpe:2.3:a:microsoft:defender_for_endpoint:-:*:*:*:*:linux:*:*

Weaknesses

CWE ID	Type	Source
CWE-94	Primary	secure@microsoft.com

CWE ID: CWE-94

Type: Primary

Source: secure@microsoft.com

References

Hyperlink	Source	Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21537	secure@microsoft.com	Vendor Advisory

Hyperlink: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21537

Source: secure@microsoft.com

Resource:

Vendor Advisory

CISA Catalog

Metrics

CPE Matches

Weaknesses

Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References

Change History