Microsoft February 2024: 2 actively exploited zero-days
Microsoft Windows
CVE-2024-21351: 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. CVE-2024-21412: Microsoft Windows Internet Shortcut Files contains an unspecified vulnerability that allows for a security feature bypass. Added to the CISA KEV catalog on 2024-02-13. CISA lists known use in ransomware campaigns.
Why this severity: CVSS 8.1 (v3.1, CNA), actively exploited (CISA KEV); known ransomware use
- Started
- Feb 13, 2024
- Closed
- Feb 13, 2024
Affected
- See vendor advisory (versions are not listed in the KEV record)
Fixed in
- See vendor advisory linked in sources
Timeline4
Advisories5
Notes & caveats
Derived from the CISA KEV JSON feed (catalogVersion 2026.10.21); CVSS from the CVE record (cveawg.mitre.org). startedAt is the CVE publication date when it fell in 2024 before the KEV listing, else the KEV dateAdded; exploitation may have begun earlier. closedAt is the KEV listing date (a fix or mitigation was available then unless noted).
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