CASCACascade Atlas

Evidence dossier

CVE-2024-21351

Windows SmartScreen Security Feature Bypass Vulnerability

70.0–85.0Priority evidence range
As known Jul 19, 2026, 5:00 AM UTCgen-56ccdaf9

Normalized restatement

Windows SmartScreen Security Feature Bypass Vulnerability

State
PUBLISHED
Published
Feb 13, 2024
Updated
Oct 21, 2025
Evidence coverage
85%
CISA KEVCatalog member

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

FIRST EPSS30.34%

2026-07-18 · v2026.06.15 · percentile 98.0%

Source stateNo scored conflict

Distinct CVSS assessments remain side by side; none are averaged.

Source comparison

Who said what

CISA-ADPindependent enrichment
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CISA ADP Vulnrichment

CVEderivative copy
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CVE Program Container

microsoftoriginal assertion
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Windows SmartScreen Security Feature Bypass Vulnerability

CISA KEVoriginal assertion
observed_exploitation

Microsoft Windows SmartScreen Security Feature Bypass Vulnerability

FIRST EPSSoriginal assertion
model_probability

Probability 0.303440000000; percentile 0.980240000000

Applicability

Cited product scope

Trace impact →
MicrosoftWindows 10 Version 1507
[{"status": "affected", "version": "10.0.10240.0", "lessThan": "10.0.10240.20469", "versionType": "custom"}]unknown
MicrosoftWindows 10 Version 1607
[{"status": "affected", "version": "10.0.14393.0", "lessThan": "10.0.14393.6709", "versionType": "custom"}]unknown
MicrosoftWindows 10 Version 1809
[{"status": "affected", "version": "10.0.17763.0", "lessThan": "10.0.17763.5458", "versionType": "custom"}]unknown
MicrosoftWindows 10 Version 1809
[{"status": "affected", "version": "10.0.0", "lessThan": "10.0.17763.5458", "versionType": "custom"}]unknown
MicrosoftWindows 10 Version 21H2
[{"status": "affected", "version": "10.0.19043.0", "lessThan": "10.0.19044.4046", "versionType": "custom"}]unknown
MicrosoftWindows 10 Version 22H2
[{"status": "affected", "version": "10.0.19045.0", "lessThan": "10.0.19045.4046", "versionType": "custom"}]unknown
MicrosoftWindows 11 version 21H2
[{"status": "affected", "version": "10.0.0", "lessThan": "10.0.22000.2777", "versionType": "custom"}]unknown
MicrosoftWindows 11 version 22H2
[{"status": "affected", "version": "10.0.22621.0", "lessThan": "10.0.22621.3155", "versionType": "custom"}]unknown
MicrosoftWindows 11 version 22H3
[{"status": "affected", "version": "10.0.22631.0", "lessThan": "10.0.22631.3155", "versionType": "custom"}]unknown
MicrosoftWindows 11 Version 23H2
[{"status": "affected", "version": "10.0.22631.0", "lessThan": "10.0.22631.3155", "versionType": "custom"}]unknown
MicrosoftWindows Server 2016
[{"status": "affected", "version": "10.0.14393.0", "lessThan": "10.0.14393.6709", "versionType": "custom"}]unknown
MicrosoftWindows Server 2019
[{"status": "affected", "version": "10.0.17763.0", "lessThan": "10.0.17763.5458", "versionType": "custom"}]unknown
MicrosoftWindows Server 2022
[{"status": "affected", "version": "10.0.20348.0", "lessThan": "10.0.20348.2322", "versionType": "custom"}]unknown
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:*:*; end excluding 10.0.10240.20469supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:*:*; end excluding 10.0.14393.6709supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:*:*; end excluding 10.0.17763.5458supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:*; end excluding 10.0.19044.4046supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:*; end excluding 10.0.19045.4046supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_11_21h2:*:*:*:*:*:*:*:*; end excluding 10.0.22000.2777supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:*:*; end excluding 10.0.22621.3155supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:*; end excluding 10.0.22631.3155supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*; end excluding 10.0.17763.5458supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*; end excluding 10.0.20348.2322supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*; end excluding 10.0.25398.709supported

Assessments

CVSS by origin

7.6
secure@microsoft.comCVSS 3.1 · role SecondaryCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L
7.6
microsoftCVSS 3.1 · role unknownCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L/E:U/RL:O/RC:C

Limitations and unknowns

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; unresolved scope remains unknown.
  • NVD-carried upstream facts remain derivative and are not independent corroboration.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Factor D is unknown in Public Core because no accepted canonical mapping-obligation ledger is present.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.