How severe is CVE-2024-21351?

CVE-2024-21351 has a CVSS 3.x base score of 7.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity high, and availability low.

Is CVE-2024-21351 being actively exploited?

Yes. CVE-2024-21351 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2024-02-13, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2024-21351?

CVE-2024-21351 primarily affects Microsoft Windows 10 1507. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-21351?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2024-21351 have an EU (EUVD) identifier?

Yes. CVE-2024-21351 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-19063. It is also flagged as exploited in the EUVD (since 2024-02-13).

When was CVE-2024-21351 published?

CVE-2024-21351 was published on 2024-02-13 and last updated on 2026-06-17.

CVE-2024-21351

CVE-2024-21351 is a high-severity vulnerability in Microsoft Windows 10 1507 with a CVSS 3.x base score of 7.6. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2024-02-13). The underlying weakness is classified as CWE-94.

Key facts

Severity: High (CVSS 3.x base score 7.6)
EPSS exploit prediction: 30% (98th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2024-02-13)
EU (EUVD) id: EUVD-2024-19063
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2024-02-13)
Weakness: CWE-94
Affected product: Microsoft Windows 10 1507
Published: 2024-02-13
Last modified: 2026-06-17

Description

Windows SmartScreen Security Feature Bypass Vulnerability

Frequently asked questions

What is CVE-2024-21351?: Windows SmartScreen Security Feature Bypass Vulnerability
How severe is CVE-2024-21351?: CVE-2024-21351 has a CVSS 3.x base score of 7.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity high, and availability low.
Is CVE-2024-21351 being actively exploited?: Yes. CVE-2024-21351 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2024-02-13, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2024-21351?: CVE-2024-21351 primarily affects Microsoft Windows 10 1507. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-21351?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2024-21351 have an EU (EUVD) identifier?: Yes. CVE-2024-21351 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-19063. It is also flagged as exploited in the EUVD (since 2024-02-13).
When was CVE-2024-21351 published?: CVE-2024-21351 was published on 2024-02-13 and last updated on 2026-06-17.

References

Affected products (12)

cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_21h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*

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