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. It is crucial for users to be aware of the potential impacts of this issue.
Details
| Severity | Base Score | CVE |
|---|---|---|
| HIGH | 7.5 | CVE-2026-20921 |
Exploitation
To exploit this vulnerability, an attacker must have authorized access to the network and can then leverage the race condition in the Windows SMB Server. By executing concurrent operations that manipulate shared resources, the attacker can elevate their privileges, potentially gaining unauthorized access to sensitive data or system functions.
Affected Products
- Windows SMB Server: A file sharing protocol that allows applications to read and write to files and request services from server programs.
Mitigation
To mitigate this vulnerability, it is recommended to apply the latest security updates provided by Microsoft. Users should also review their network access controls and ensure that only authorized personnel have access to sensitive systems. Regular monitoring and auditing of network activities can help detect any unauthorized attempts to exploit this vulnerability.