CVE-2024-21351
Microsoft Windows SmartScreen Security Feature Bypass Vulnerability
CVSS
7.6
High
EPSS
27.8%
p98
KEV
YES
Feb 13, 2024
Exploit Today
79
0-100
Published: Feb 13, 2024 · Last modified: Aug 10, 2026 · CWE-94
27.8%EPSS · 30 days30.3%
2026-09-172026-10-15
Product
Microsoft / Windows
Vulnerability
Microsoft Windows SmartScreen Security Feature Bypass Vulnerability
Added to KEV
Feb 13, 2024
Remediate by
Mar 5, 2024
Known ransomware use
No
Summary description
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.
Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Notes
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2024-21351; https://nvd.nist.gov/vuln/detail/CVE-2024-21351
Windows SmartScreen Security Feature Bypass Vulnerability
CVECVSSEPSSKEVRExploitTitleMod.
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