CVE-2023-38163: Microsoft Windows Defender Security Intelligence Updates

High severity, CVSS 7.8. EPSS: 0.7% chance of exploitation in the next 30 days.

Windows Defender Attack Surface Reduction Security Feature Bypass

Affected products

• Microsoft Windows Defender Security Intelligence Updates: from 1.0.0, before 1.391.1332.0 (fixed in 1.391.1332.0)

Published 2023-09-12. Last modified 2026-06-17.