CVE-2026-21537: Microsoft Defender For Endpoint

High severity, CVSS 8.8. EPSS: 0.5% chance of exploitation in the next 30 days.

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

Affected products

• Microsoft Defender For Endpoint: affected versions not specified

Published 2026-02-10. Last modified 2026-06-17.