Microsoft Windows SmartScreen Security Feature Bypass Vulnerability (CVE-2024-21351)
Severity: high · Patch status: patched · Since 2024-02-13 · 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. CISA added CVE-2024-21351 to its Known Exploited Vulnerabilities catalog on Feb 13, 2024, which means attackers are exploiting it in the wild.
What to do
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- US federal agencies must remediate by Mar 5, 2024 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
