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

Source: https://junglewise.ai/threats/cve-2024-21351-microsoft-windows-smartscreen-security-feature-bypass  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2024-02-13. Updated: 2026-05-09  
License: CC BY 4.0 with a link back

CVE-2024-21351 · Severity: critical · CVSS 7.6 · Exploited in the wild · Published 2024-02-13

Microsoft Windows SmartScreen contains a security feature bypass vulnerability that allows an attacker to bypass the user experience and inject code. Successful exploitation could lead to unauthorized code execution, data exposure, and impacts on system availability.

Technologies: [Microsoft Windows](https://junglewise.ai/threats/technologies/windows). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2024-21351 exploited in the wild?** Yes. CVE-2024-21351 is known to be exploited in the wild, first recorded on 13 February 2024. Treat it as urgent.

**How severe is CVE-2024-21351?** Critical severity, with a CVSS score of 7.6, published 13 February 2024.

**Which products and versions are affected?** Microsoft Windows 10 1507, 1607, 1809, 21H2, 22H2; Microsoft Windows 11 21H2, 22H2, 23H2; Microsoft Windows Server 2016 -; Microsoft Windows Server 2019 -; and 2 more.

**Is there a fix for CVE-2024-21351?** A patch was published on 2024-02-13. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2024-21351 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2024-21351?** Check whether you run Microsoft Windows. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Microsoft Windows 10 1507, 1607, 1809, 21H2, 22H2
- Microsoft Windows 11 21H2, 22H2, 23H2
- Microsoft Windows Server 2016 -
- Microsoft Windows Server 2019 -
- Microsoft Windows Server 2022 -
- Microsoft Windows Server 2022 23H2 -

## Timeline

- 2024-02-13: disclosed
- 2024-02-13: patched
- 2024-02-13: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2024-02-13: exploited: Reported as exploited in the wild at time of publication.

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