CVE-2026-21537

High

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.

SeverityHigh

CVSS8.8

Exploit probability—

Product

Microsoft Defender For Endpoint

PublishedFeb 10, 2026

First seenFeb 10, 2026

Weakness typeCWE-94Code injection

How to fix

Patches

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

Affected products

Product	Affected versions	Fixed in
microsoft defender_for_endpoint	No range specified	—

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