Microsoft Windows: SmartScreen Security Feature Bypass (CVE-2023-24880)
Microsoft Windows
Microsoft Windows SmartScreen contains a security feature bypass vulnerability that could allow an attacker to evade Mark of the Web (MOTW) defenses via a specially crafted malicious file. Added to CISA KEV on 2023-03-14. CISA lists known use in ransomware campaigns.
Why this severity: CVSS 4.4 (NVD), actively exploited (CISA KEV), known ransomware use
- Started
- Mar 14, 2023
- Closed
- Mar 14, 2023
Affected
- See vendor advisory / CISA notes (versions not always listed in KEV feed)
Fixed in
- See vendor advisory linked in sources
Timeline1
CISA added CVE-2023-24880 to the KEV catalog (due 2023-04-04).
Advisories3
Notes & caveats
Derived from CISA KEV JSON feed catalogVersion 2026.10.21. Exact affected/fixed version strings are not always in the KEV record — verify against the vendor advisory URL. startedAt uses dateAdded (exploitation may have begun earlier).
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