CVE-2026-20848
Unknown
Unknown - Not Provided
Race Condition in Windows SMB Server Enables Privilege Escalation
Publication date: 2026-01-13
Last updated on: 2026-01-13
Assigner: Microsoft Corporation
Description
Description
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to elevate privileges over a network.
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| microsoft | windows_smb_server | * |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-362 | The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a race condition in the Windows SMB Server where concurrent execution using a shared resource occurs without proper synchronization. This flaw allows an authorized attacker to elevate their privileges over a network.
How can this vulnerability impact me? :
An attacker who is authorized on the network could exploit this vulnerability to gain higher privileges than they should have, potentially allowing them to perform unauthorized actions, access sensitive data, or disrupt system operations.
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