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SMA: Directory Traversal in Sunny Boy

VDE-2025-066
Last update
08/27/2025 10:00
Published at
08/27/2025 10:00
Vendor(s)
SMA Solar Technology AG
External ID
VDE-2025-066
CSAF Document

Summary

A security researcher discovered a Directory Traversal vulnerability in Sunny Boy 3, which allows remote attackers to access sensitive information.
The vulnerability is already fixed since January 2021 with version 3.10.27.R.

Impact

An authenticated user can access files and directories outside the intended web root.

Affected Product(s)

Model no. Product name Affected versions
SB3.0-1AV-41 Sunny Boy 3.0 Firmware <3.10.27.R
SB3.6-1AV-41 Sunny Boy 3.6 Firmware <3.10.27.R
SB4.0-1AV-41 Sunny Boy 4.0 Firmware <3.10.27.R
SB5.0-1AV-41 Sunny Boy 5.0 Firmware <3.10.27.R
SB6.0-1AV-41 Sunny Boy 6.0 Firmware <3.10.27.R

Vulnerabilities

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Published
09/22/2025 14:57
Weakness
Relative Path Traversal (CWE-23)
Summary

An authorized remote attacker can access files and directories outside the intended web root, potentially exposing sensitive system information of the affected Sunny Boy devices.

References

Remediation

Update Firmware to at least version 3.10.27.R.

Revision History

Version Date Summary
1.0.0 08/27/2025 10:00 Initial revision.