Microsoft Windows SmartScreen Security Feature Bypass Vulnerability

HIGH 7.6EXPLOITED (CISA KEV)CVE-2024-21351 · Published 13/02/2024 · updated 10/08/2026

Microsoft Windows SmartScreen Security Feature Bypass Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 13/02/2024. Patch affected systems as an emergency.

In short

CVE-2024-21351 is a HIGH (CVSS 7.6) vulnerability.
Exploited in the wild: CISA added it to the KEV catalog on 13/02/2024.
Chance of exploitation in the next 30 days (EPSS): 27.8%, higher than 98.1% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
Windows Microsoft	Versions not published yet (product named by CISA KEV)

Description

Windows SmartScreen Security Feature Bypass Vulnerability

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21351 · Patch
cisa.gov/known-exploited-vulnerabilities-catalog · US Government Resource
CISA KEV · CVE-2024-21351

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