Actively exploited in the wild
Microsoft Windows SmartScreen Security Feature Bypass Vulnerability
Microsoft - Windows · Listed in the CISA KEV since 2024-02-13. This indicates confirmed attacks in production environments.
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
CVE-2024-21351
HighCVSS 7.6KEVExploitation Probability (EPSS)
Very high risk98th percentile - higher than 98% of all known CVEs
Summary
A security feature bypass vulnerability in Windows SmartScreen.
Risk Assessment
An attacker could bypass SmartScreen protections, potentially allowing malicious software or dangerous files to be delivered to users.
Recommendation
Apply the security update provided by Microsoft.
Other vulnerabilities in Windows SmartScreen
See all- CVE-2024-29988HighActively exploited
A vulnerability in the SmartScreen Prompt allows a security feature bypass. Technical details are not disclosed in the description.
- CVE-2023-36025HighActively exploited
A security feature bypass vulnerability in Windows SmartScreen. It may allow an attacker to bypass protective mechanisms.
- CVE-2023-32049HighActively exploited
Windows SmartScreen Security Feature Bypass Vulnerability. Technical details are not provided in the description.
- CVE-2023-24880MediumActively exploited
Windows SmartScreen Security Feature Bypass Vulnerability. Details are not provided in the description.
- CVE-2022-44698MediumActively exploited
Windows SmartScreen Security Feature Bypass Vulnerability. Details are not provided in the description.
- CVE-2026-85851High
Use after free in Windows SmartScreen allows an authorized attacker to elevate privileges locally.
- CVE-2026-83504Medium
A time-of-check time-of-use (TOCTOU) race condition vulnerability exists in Windows SmartScreen. An authorized attacker can exploit this to disclose information locally.
- CVE-2026-70051High
A type confusion vulnerability exists in Windows SmartScreen. An authorized attacker can exploit this flaw to elevate privileges locally.
- CVE-2026-62879Medium
Missing authentication for critical function in Windows SmartScreen allows an authorized attacker to perform tampering locally.
- CVE-2026-108463High
Improper resolution of path equivalence in Windows SmartScreen allows an unauthorized attacker to bypass a security feature over a network.
Original NVD description (English source)
Windows SmartScreen Security Feature Bypass Vulnerability
Vulnerability data from NVD (NIST) · CISA KEV · EPSS