Product:
Windows SMB Server
Summary
Concurrent execution using shared resource with improper synchronization in Windows SMB Server allows an authorized attacker to elevate privileges over a network. This vulnerability can lead to significant security risks if exploited. Attackers can take advantage of this race condition to gain unauthorized access and control over affected systems.
Details
| Severity | Base Score | CVE |
|---|---|---|
| HIGH | 7.5 | CVE-2026-20934 |
Exploitation
To exploit this vulnerability, an attacker must have authorized access to the network where the Windows SMB Server is running. By executing concurrent processes that access shared resources without proper synchronization, the attacker can manipulate the execution flow and elevate their privileges. This requires a high level of technical skill and knowledge of the system’s architecture.
Affected Products
- Windows SMB Server: A file sharing service that allows applications to read and write to files and request services from server programs in a computer network.
Mitigation
To mitigate this vulnerability, it is recommended to apply the latest security updates provided by Microsoft. Additionally, organizations should implement strict access controls and monitor network activity to detect any unauthorized attempts to exploit this vulnerability.