CVE-2024-21351
KEVMicrosoft Windows SmartScreen Security Feature Bypass Vulnerability
Description
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.
Windows SmartScreen Security Feature Bypass Vulnerability
CVSS 3.1 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:LPublishedFeb 13, 2024
Last modifiedAug 10, 2026
Added to KEVFeb 13, 2024
Remediation dueMar 5, 2024
References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21351PatchVendor Advisory
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-21351US Government Resource
0 recent articles mention this CVE
71
Risk assessment · High
Actively exploited. Patch immediately.
- Exploitation
- Confirmed in the wild (CISA KEV)
- Federal remediation deadline
- Overdue by 967 days
- CVSS
- 7.6 HIGH
- EPSS (30-day exploit probability)
- 27.8% · top 2% of all CVEs
- Weakness
- CWE-94
- Attack vector
- Network, remotely reachable
Recommended actions
- 1.Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- 2.Treat as emergency change: patch or isolate internet-facing instances first.
- 3.Review exposure: confirm which instances are reachable from the internet and restrict access until patched.
- 4.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
Assessment is derived automatically from the live signals above; verify against your own asset inventory.