CVE-2024-21351
A permanent, source-backed tracker page. Values are shown only when returned; explicit gaps and read failures remain different states.
What it is
ReportedMicrosoft 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. Source description excerpt; complete tracked detail loads below.
NVD published: Feb 13, 2024 · Source record updated: Aug 8, 2026 · Tracker snapshot: Aug 8, 2026
What is affected
ReportedMicrosoft — Windows. Product-level identification only; no affected-version conclusion is available from this field.
NVD published: Feb 13, 2024 · Source record updated: Aug 8, 2026 · Tracker snapshot: Aug 8, 2026
Urgency and basis
ReportedAct now · 558.5
Tracker decision tier from the evidence detailed below · Source record updated: Aug 8, 2026 · Tracker snapshot: Aug 8, 2026
Exploitation evidence
Reportedkev-listed · CISA KEV · VulnCheck KEV · ENISA exploited-vulnerability catalog
Active since: Feb 13, 2024 · CISA KEV added: Feb 13, 2024 · VulnCheck KEV added: Feb 13, 2024 · ENISA added: Feb 13, 2024 · Source record updated: Aug 8, 2026 · Tracker snapshot: Aug 8, 2026
What to do
ReportedApply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Source remediation ↗Tracked source remediation field · Source record updated: Aug 8, 2026 · Tracker snapshot: Aug 8, 2026
Evidence detail
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