CVE-2024-21351

HIGH CISA KEV

Published Feb 13, 2024 Modified Oct 28, 2025 CWE-94

Description

Windows SmartScreen Security Feature Bypass Vulnerability

CVSS v3.1 Score

7.6

HIGH

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

CISA Known Exploited Vulnerability

This vulnerability is actively exploited in the wild.

Added: Feb 13, 2024 Remediation due: Mar 5, 2024

Weakness Type (CWE)

CWE-94 CWE-94

Affected Products

Vendor	Product	Versions
microsoft	windows_10_1507	< 10.0.10240.20469
microsoft	windows_10_1607	< 10.0.14393.6709
microsoft	windows_10_1809	< 10.0.17763.5458
microsoft	windows_10_21h2	< 10.0.19044.4046
microsoft	windows_10_22h2	< 10.0.19045.4046
microsoft	windows_11_21h2	< 10.0.22000.2777
microsoft	windows_11_22h2	< 10.0.22621.3155
microsoft	windows_11_23h2	< 10.0.22631.3155
microsoft	windows_server_2016	All
microsoft	windows_server_2019	< 10.0.17763.5458
microsoft	windows_server_2022	< 10.0.20348.2322
microsoft	windows_server_2022_23h2	< 10.0.25398.709

References

Advisories & Patches

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21351 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21351

Other References

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-21351

Frequently Asked Questions

What is CVE-2024-21351? +

Windows SmartScreen Security Feature Bypass Vulnerability It has a CVSS v3.1 base score of 7.6 (HIGH). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.

How severe is CVE-2024-21351? +

CVE-2024-21351 has a CVSS v3.1 score of 7.6 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2024-21351? +

CVE-2024-21351 affects products from microsoft, specifically: windows_10_1507, windows_10_1607, windows_10_1809, windows_10_21h2, windows_10_22h2, windows_11_21h2, windows_11_22h2, windows_11_23h2, windows_server_2016, windows_server_2019, windows_server_2022, windows_server_2022_23h2. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-21351? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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