Authenticated file disclosure via relative path traversal
Published Aug 27, 2025 · Updated Aug 27, 2025
Relative path traversal in SMA Sunny Boy firmware before 3.10.27.R allows remote authenticated users to read files outside the web root. Public advisories do not identify the affected request handler or path parameter, but state that it fails to confine authorized file access to the intended web root. Valid device credentials and network access to the inverter are required, and the reported consequence is disclosure of sensitive system information.
Summary
What happened
Relative path traversal in SMA Sunny Boy firmware before 3.10.27.R allows remote authenticated users to read files outside the web root. Public advisories do not identify the affected request handler or path parameter, but state that it fails to confine authorized file access to the intended web root. Valid device credentials and network access to the inverter are required, and the reported consequence is disclosure of sensitive system information.
The record
- CVE
- CVE-2021-4459
- Published
- Aug 27, 2025
- Updated
- Aug 27, 2025
- Vendor
- SMA Solar Technology AG
- Product
- Sunny Boy
- Classifications
- CWE-23, T1005
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 27, 2025CVE publishedPublication date reported by the CVE source.
- Aug 27, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0.0.0 <3.10.27.R
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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