CVE-2024-21351 — Windows SmartScreen Security Feature Bypass Vulnerability

Executive Summary

None

Overview

7.6

CVSS HIGH

Moderate

MS Severity

Exploited

MS Exploit Status

Exploitation Detected

MS Exploit Likelihood

Category Security Feature Bypass

Released Feb 13 2024

Last Updated Feb 13 2024

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score 0.30344 — 0.97992 percentile

NVD CVSS 7.6 HIGH — matches MSRC

CVSS Vector

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

ATTACK VECTOR

Network

ATTACK COMPLEXITY

Low

PRIVILEGES REQUIRED

None

USER INTERACTION

Required

SCOPE

Unchanged

CONFIDENTIALITY

Low

INTEGRITY

High

AVAILABILITY

Low

EXPLOIT CODE MATURITY

Unproven

REMEDIATION LEVEL

Official Fix

REPORT CONFIDENCE

Confirmed

Temporal Score: 6.6

EPSS Score

0.30344

probability of exploitation in the next 30 days

0.97992 percentile - updated 2026-06-21

View on FIRST.org

Affected Products

22 affected products

Product	KB Article	Severity	Impact	Restart Required
Windows 10 for 32-bit Systems	`5034774 (Security Update)`	Moderate	Security Feature Bypass	Yes
Windows 10 for x64-based Systems	`5034774 (Security Update)`	Moderate	Security Feature Bypass	Yes
Windows 10 Version 1607 for 32-bit Systems	`5034767 (Security Update)`	Moderate	Security Feature Bypass	Yes
Windows 10 Version 1607 for x64-based Systems	`5034767 (Security Update)`	Moderate	Security Feature Bypass	Yes
Windows 10 Version 1809 for 32-bit Systems	`5034768 (Security Update)`	Moderate	Security Feature Bypass	Yes
Windows 10 Version 1809 for ARM64-based Systems	`5034768 (Security Update)`	Moderate	Security Feature Bypass	Yes
Windows 10 Version 1809 for x64-based Systems	`5034768 (Security Update)`	Moderate	Security Feature Bypass	Yes
Windows 10 Version 21H2 for 32-bit Systems	`5034763 (Security Update)`	Moderate	Security Feature Bypass	Yes
Windows 10 Version 21H2 for ARM64-based Systems	`5034763 (Security Update)`	Moderate	Security Feature Bypass	Yes
Windows 10 Version 21H2 for x64-based Systems	`5034763 (Security Update)`	Moderate	Security Feature Bypass	Yes
Windows 10 Version 22H2 for 32-bit Systems	`5034763 (Security Update)`	Moderate	Security Feature Bypass	Yes
Windows 10 Version 22H2 for ARM64-based Systems	`5034763 (Security Update)`	Moderate	Security Feature Bypass	Yes
Windows 10 Version 22H2 for x64-based Systems	`5034763 (Security Update)`	Moderate	Security Feature Bypass	Yes
Windows 11 version 21H2 for ARM64-based Systems	`5034766 (Security Update)`	Moderate	Security Feature Bypass	Yes
Windows 11 version 21H2 for x64-based Systems	`5034766 (Security Update)`	Moderate	Security Feature Bypass	Yes
Windows 11 Version 22H2 for ARM64-based Systems	`5034765 (Security Update)`	Moderate	Security Feature Bypass	Yes
Windows 11 Version 22H2 for x64-based Systems	`5034765 (Security Update)`	Moderate	Security Feature Bypass	Yes
Windows 11 Version 23H2 for ARM64-based Systems	`5034765 (Security Update)`	Moderate	Security Feature Bypass	Yes
Windows 11 Version 23H2 for x64-based Systems	`5034765 (Security Update)`	Moderate	Security Feature Bypass	Yes
Windows Server 2016	`5034767 (Security Update)`	Moderate	Security Feature Bypass	Yes
Windows Server 2019	`5034768 (Security Update)`	Moderate	Security Feature Bypass	Yes
Windows Server 2022	`5034770 (Security Update)`	Moderate	Security Feature Bypass	Yes

Patches

7 patches

Article	Type	Restart
`5034774`	Security Update	Yes
`5034767`	Security Update	Yes
`5034768`	Security Update	Yes
`5034763`	Security Update	Yes
`5034766`	Security Update	Yes
`5034765`	Security Update	Yes
`5034770`	Security Update	Yes

Known Exploits

No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.

Acknowledgments

Eric Lawrence

References

MSRC Advisory MITRE NVD