VulnerabilityAnalyzed
CVE-2024-21351
Microsoft Windows SmartScreen Security Feature Bypass Vulnerability
KEVHIGH 7.6EPSS 30.3%
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 5 March 2024). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
Windows SmartScreen Security Feature Bypass Vulnerability
- CVSS 3.1
- 7.6 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L
- EPSS
- 30.34% probability · 98th percentile
- CISA KEV
- Listed 13 February 2024 · due 5 March 2024
- Weakness
- CWE-94
- Affected
- microsoft/windows 10 1507 · microsoft/windows 10 1607 · microsoft/windows 10 1809 · microsoft/windows 10 21h2 · microsoft/windows 10 22h2 · microsoft/windows 11 21h2 · microsoft/windows 11 22h2 · microsoft/windows 11 23h2 · microsoft/windows server 2016 · microsoft/windows server 2019 · microsoft/windows server 2022 · microsoft/windows server 2022 23h2
- Source
- secure@microsoft.com
CISA notes
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2024-21351; https://nvd.nist.gov/vuln/detail/CVE-2024-21351
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21351Patch, Vendor Advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21351Patch, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-21351US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.