Vulnerability
Microsoft Windows SmartScreen Security Feature Bypass Vulnerability
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.
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
CISA 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.”
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:LAbove the FIRST 'patch on a priority schedule' threshold.
No VEX statements published for CVE-2024-21351. Vendors publish VEX (Vulnerability Exploitability eXchange) to assert per-product whether a CVE is actually exploitable in their distribution.
Active exploitation with total impact on essential/support systems