CVE-2024-21351: Microsoft Windows SmartScreen Security Feature Bypass Vulnerability

Required action (CISA's text)

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Description (NVD)

Microsoft Windows SmartScreen contains a security feature bypass vulnerability that allows an attacker to bypass the SmartScreen user experience and inject code to potentially gain code execution, which could lead to some data exposure, lack of system availability, or both.

SOURCES

• CISA KEVCISA Known Exploited Vulnerabilities catalog

Other Microsoft flaws

• patchtuesday:2026-11: Vulnerability in Microsoft
• CVE-2026-124194: Microsoft Office Outlook Missing User Interaction for Potentially Unsafe Action Vulnerability
• CVE-2026-96951: Microsoft Windows Command Injection Vulnerability
• CVE-2026-65660: Microsoft SharePoint Code Injection Vulnerability
• CVE-2026-85880: Microsoft Windows Heap-Based Buffer Overflow Vulnerability

Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.