CVE-2026-20834
Unknown
Unknown - Not Provided
BaseFortify
Publication date: 2026-01-13
Last updated on: 2026-01-15
Assigner: Microsoft Corporation
Description
Description
Absolute path traversal in Windows Shell allows an unauthorized attacker to perform spoofing with a physical attack.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| microsoft | windows_10_1607 | to 10.0.14393.8783 (exc) |
| microsoft | windows_10_1607 | to 10.0.14393.8783 (exc) |
| microsoft | windows_10_1809 | to 10.0.17763.8276 (exc) |
| microsoft | windows_10_1809 | to 10.0.17763.8276 (exc) |
| microsoft | windows_10_21h2 | to 10.0.19044.6809 (exc) |
| microsoft | windows_10_22h2 | to 10.0.19045.6809 (exc) |
| microsoft | windows_11_23h2 | to 10.0.22631.6491 (exc) |
| microsoft | windows_11_24h2 | to 10.0.26100.7623 (exc) |
| microsoft | windows_11_25h2 | to 10.0.26200.7623 (exc) |
| microsoft | windows_server_2008 | * |
| microsoft | windows_server_2008 | * |
| microsoft | windows_server_2008 | r2 |
| microsoft | windows_server_2012 | * |
| microsoft | windows_server_2012 | r2 |
| microsoft | windows_server_2016 | to 10.0.14393.8783 (exc) |
| microsoft | windows_server_2019 | to 10.0.17763.8276 (exc) |
| microsoft | windows_server_2022 | to 10.0.20348.4648 (exc) |
| microsoft | windows_server_2022_23h2 | to 10.0.25398.2092 (exc) |
| microsoft | windows_server_2025 | to 10.0.26100.32230 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-359 | The product does not properly prevent a person's private, personal information from being accessed by actors who either (1) are not explicitly authorized to access the information or (2) do not have the implicit consent of the person about whom the information is collected. |
| CWE-36 | The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize absolute path sequences such as "/abs/path" that can resolve to a location that is outside of that directory. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is an absolute path traversal issue in Windows Shell that allows an unauthorized attacker to perform spoofing by physically accessing the device. [1]
How can this vulnerability impact me? :
The vulnerability can impact you by enabling an attacker with physical access to spoof content or actions on the affected Windows system, potentially misleading users or systems. [1]
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