How severe is CVE-2024-21351?

CVE-2024-21351 has a CVSS 3.1 base score of 7.6 (HIGH). EPSS estimates a 27.8% probability of exploitation in the next 30 days. It is listed in the CISA Known Exploited Vulnerabilities catalog.

CVE-2024-21351: Windows SmartScreen Security Feature Bypass

CISA Known Exploited Vulnerabilities

Microsoft Windows SmartScreen Security Feature Bypass Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.

Added to KEV

2024-02-13

Remediation due

2024-03-05

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

CISA notes
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2024-21351; https://nvd.nist.gov/vuln/detail/CVE-2024-21351

Description

Windows SmartScreen Security Feature Bypass Vulnerability

Severity

CVSS 3.1 · CNA7.6 HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L/E:U/RL:O/RC:C

SSVC · CISA-ADP

Exploitationactive

Automatableno

Technical impactpartial

Affected Products

Vendor	Product	Affected versions
Microsoft	Windows 10 Version 1507	10.0.10240.0 to <10.0.10240.20469
Microsoft	Windows 10 Version 1607	10.0.14393.0 to <10.0.14393.6709
Microsoft	Windows 10 Version 1809	10.0.17763.0 to <10.0.17763.5458
Microsoft	Windows 10 Version 1809	10.0.0 to <10.0.17763.5458
Microsoft	Windows 10 Version 21H2	10.0.19043.0 to <10.0.19044.4046
Microsoft	Windows 10 Version 22H2	10.0.19045.0 to <10.0.19045.4046
Microsoft	Windows 11 version 21H2	10.0.0 to <10.0.22000.2777
Microsoft	Windows 11 version 22H2	10.0.22621.0 to <10.0.22621.3155
Microsoft	Windows 11 version 22H3	10.0.22631.0 to <10.0.22631.3155
Microsoft	Windows 11 Version 23H2	10.0.22631.0 to <10.0.22631.3155
Microsoft	Windows Server 2016	10.0.14393.0 to <10.0.14393.6709
Microsoft	Windows Server 2019	10.0.17763.0 to <10.0.17763.5458
Microsoft	Windows Server 2022	10.0.20348.0 to <10.0.20348.2322

References

1 Links

Vendor advisories

Windows SmartScreen Security Feature Bypass Vulnerability

Record Details

Published

2024-02-13

Last updated

2026-08-10

Assigner (CNA)

microsoft

Credited to

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Related Tool Categories

Tool categories that test for or protect against this vulnerability class.

CWE-94 · Code Injection

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CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.