CVE-2024-21351
Actively exploited. CVE-2024-21351 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2024-02-13) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
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.
CSIRTS triage
- What
- A security feature bypass vulnerability allows an attacker to inject code potentially leading to data exposure or lack of system availability.
- Who is affected
- Users of Microsoft Windows with SmartScreen enabled are affected.
- Urgency
- Remediation is urgent due to active exploitation and critical severity.
- Action
- Install the latest updates for Windows to address this vulnerability.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 98% of all EPSS-scored CVEs.
Advisory coverage (1)
- criticalexploitedCVE-2024-21351: Microsoft Windows SmartScreen Security Feature Bypass Vulnerabilitycisa-kev · 2024-02-13
External references
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