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Vulnerability Intelligence

CVE-2024-21351

HighExploitedPublic exploit

Windows SmartScreen Security Feature Bypass Vulnerability

Published Feb 16, 2024 · Updated Aug 10, 2026

Key Facts

Patch immediately
  • CVE-2024-21351 is a high-severity vulnerability (CVSS 7.6 v3.1) affecting Windows 10 1507 (Microsoft), Windows 10 1607 (Microsoft), Windows 10 1809 (Microsoft) and 18 more products.
  • It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Feb 13, 2024. Public exploit code is available.
  • EPSS estimates a 28% probability of exploitation in the next 30 days.
  • Fixed versions are available, including Windows 10 1507 10.0.10240.20469, Windows 10 1607 10.0.14393.6709, Windows 10 1809 10.0.17763.5458.
  • Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v3.1

7.6

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

EPSS (30-day exploit likelihood)

28%

Higher than 98.0% of all scored CVEs

Exploited in the wild

Yes

4 catalog listings

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2024-21351 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

Windows SmartScreen Security Feature Bypass Vulnerability

Known-Exploited Catalog Listings

CatalogAddedRemediation dueRansomware use
CISA KEVFeb 13, 2024Mar 5, 2024Not reported
Industry KEV feedFeb 13, 2024Mar 5, 2024Not reported
CIRCL KEVFeb 13, 2024Mar 5, 2024Not reported
ENISA EUVDFeb 13, 2024n/aNot reported

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

Affected Products

24 affected entries in total
ProductAffected versionsFixed in
Windows 10 1507MicrosoftSee advisory10.0.10240.20469
Windows 10 1607MicrosoftSee advisory10.0.14393.6709
Windows 10 1809MicrosoftSee advisory10.0.17763.5458
Windows 10 21h2MicrosoftSee advisory10.0.19044.4046
Windows 10 22h2MicrosoftSee advisory10.0.19045.4046
16 more affected products in the full CVE brief

Patched Releases

Windows 10 1507

10.0.10240.20469

Windows 10 1607

10.0.14393.6709

Windows 10 1809

10.0.17763.5458

Windows 10 21h2

10.0.19044.4046

Windows 10 22h2

10.0.19045.4046

Windows 11 21h2

10.0.22000.2777

Windows 11 22h2

10.0.22621.3155

Windows 11 23h2

10.0.22631.3155

Windows Server 2019

10.0.17763.5458

Windows Server 2022

10.0.20348.2322

Windows Server 2022 23h2

10.0.25398.709

Windows 10 Version 1507

10.0.10240.20469

Windows 10 Version 1607

10.0.14393.6709

Windows 10 Version 1809

10.0.17763.5458

Windows 10 Version 21H2

10.0.19044.4046

Windows 10 Version 22H2

10.0.19045.4046

Windows 11 version 21H2

10.0.22000.2777

Windows 11 version 22H2

10.0.22621.3155

Windows 11 version 22H3

10.0.22631.3155

Windows 11 Version 23H2

10.0.22631.3155

Windows Server 2016

10.0.14393.6709

Timeline

  1. Added to CISA KEV

    Feb 13, 2024

  2. Added to Industry KEV feed

    Feb 13, 2024

  3. Added to CIRCL KEV

    Feb 13, 2024

  4. Added to ENISA EUVD

    Feb 13, 2024

  5. Publicly disclosed

    Feb 16, 2024

  6. Last updated

    Aug 10, 2026

Weakness Type

  • CWE-94 Improper Control of Generation of Code ('Code Injection')

References

13 more references in the full CVE brief

FAQ

Common Questions.

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