CVE-2021-4459
BaseFortify
Publication date: 2025-08-27
Last updated on: 2025-08-29
Assigner: CERT VDE
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| sma_solar_technology_ag | sunny_boy | 4.0 |
| sma_solar_technology_ag | sunny_boy | 3.0 |
| sma_solar_technology_ag | sunny_boy | 3.6 |
| sma_solar_technology_ag | sunny_boy | 5.0 |
| sma_solar_technology_ag | sunny_boy | 6.0 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-23 | The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize sequences such as ".." 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?
CVE-2021-4459 is a Directory Traversal vulnerability affecting SMA Solar Technology AG's Sunny Boy devices (versions 3.0, 3.6, 4.0, 5.0, and 6.0 prior to firmware 3.10.27.R). It allows an authenticated remote attacker to access files and directories outside the intended web root, potentially exposing sensitive system information. [1]
How can this vulnerability impact me? :
This vulnerability can impact you by allowing an authenticated remote attacker to access sensitive system information stored outside the intended web root on affected Sunny Boy devices. This exposure could lead to information disclosure without affecting system integrity or availability. [1]
What immediate steps should I take to mitigate this vulnerability?
The immediate step to mitigate this vulnerability is to update affected Sunny Boy devices to firmware version 3.10.27.R or later, as this version contains the fix for the directory traversal vulnerability. [1]