CVE-2026-83839
HighCVSS 7.0Summary
Time-of-check time-of-use (toctou) race condition in Windows Hyper-V allows an authorized attacker to elevate privileges locally.
Risk Assessment
An attacker could exploit the race condition to gain higher privileges, potentially leading to full system or virtualization environment compromise.
Recommendation
Apply the latest Windows security updates.
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A vulnerability in Windows Hyper-V allows remote code execution when the system fails to properly validate input from a privileged user on a guest operating system.
Original NVD description (English source)
Time-of-check time-of-use (toctou) race condition in Windows Hyper-V allows an authorized attacker to elevate privileges locally.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS