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7.0

Windows TCP/IP Privilege Escalation through Shared Resource Race Condition

CVE-2026-27921
Summary

A Windows vulnerability allows an attacker with local access to potentially gain administrator privileges, giving them more control over your computer. This happens when Windows doesn't properly manage access to shared resources. You should update your Windows system to fix this issue and prevent unauthorized access.

Original title
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an authorized attacker to elevate privileges locally.
Original description
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an authorized attacker to elevate privileges locally.
nvd CVSS3.1 7.0
Vulnerability type
CWE-362 Race Condition
CWE-416 Use After Free
Published: 14 Apr 2026 · Updated: 14 Apr 2026 · First seen: 14 Apr 2026