Is CVE-2024-21351 in the CISA KEV catalog?

Yes. CVE-2024-21351 is on the CISA Known Exploited Vulnerabilities list, added 2024-02-13.

What is the CVSS severity of CVE-2024-21351?

CVE-2024-21351 has a CVSS v3 base score of 7.6 (HIGH).

What is the EPSS score for CVE-2024-21351?

CVE-2024-21351 has an EPSS score of 30.34% (98th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2024-21351

HIGHCISA KEVEPSS 98th pctl

7.6

CVSS v3

NVD

Description

Windows SmartScreen Security Feature Bypass Vulnerability

CWE-94Code Injection

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityHigh

AvailabilityLow

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

Exploit Intelligence

30.34%probability of exploitation in 30 days

98thpercentile

Very high risk: more likely to be exploited than 98% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Microsoft Windows SmartScreen Security Feature Bypass Vulnerability

Microsoft Windows SmartScreen contains a security feature bypass vulnerability that allows an attacker to bypass the SmartScreen user experience and inject code to potentially gain code execution, which could lead to some data exposure, lack of system availability, or both.

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

Remediation due: 2024-03-05

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-28.