CVE-2021-4459: SMA: Directory Traversal in Sunny Boy <3.10.27.R

Published Aug 27, 2025
·
Updated

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.

Affected Software

1 affected component
SMA Sunny Boy<3.10.27.R

Event History

Aug 27, 2025
CVE Published
via MITRE·08:00 AM
Data Sourced
via MITRE·08:00 AM
DescriptionSeverityWeakness
Data Sourced
via NVD·08:15 AM
DescriptionSeverityWeakness
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Frequently Asked Questions

1

What is the severity of CVE-2021-4459?

CVE-2021-4459 has a severity rating of medium, indicating a significant risk from unauthorized file access.

2

How do I fix CVE-2021-4459?

To fix CVE-2021-4459, update the Sunny Boy devices to the latest version beyond 3.10.27.R where the vulnerability is addressed.

3

What are the potential risks associated with CVE-2021-4459?

The risks associated with CVE-2021-4459 include unauthorized access to sensitive system information that can compromise device security.

4

Who is affected by CVE-2021-4459?

CVE-2021-4459 affects users of SMA Sunny Boy devices running versions up to and including 3.10.27.R.

5

Can CVE-2021-4459 be exploited remotely?

Yes, CVE-2021-4459 can be exploited by an authorized remote attacker, allowing them to access files outside the intended web root.

Contact

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Fortitude Valley,
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