CVE-2026-83504
MediumCVSS 4.7Exploitation Probability (EPSS)
Low risk15th percentile - higher than 15% of all known CVEs
Summary
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.
Risk Assessment
An attacker could exploit the time window between check and use to access sensitive information, potentially leading to data leakage.
Recommendation
Install patches for Windows SmartScreen and monitor for unusual behavior related to file verification.
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-2024-21351HighActively exploited
A security feature bypass vulnerability in Windows SmartScreen.
- 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-2026-70051High
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)
Time-of-check time-of-use (toctou) race condition in Windows SmartScreen allows an authorized attacker to disclose information locally.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS