Siemens SCALANCE LPE9403 up to 3.x SFTP path traversal

Summaryinfo

A vulnerability was found in Siemens SCALANCE LPE9403 up to 3.x. It has been classified as critical. This affects an unknown function of the component SFTP. Performing a manipulation results in path traversal. This vulnerability is identified as CVE-2025-27395. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical has been found in Siemens SCALANCE LPE9403 up to 3.x. This affects an unknown code block of the component SFTP. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A vulnerability has been identified in SCALANCE LPE9403 (6GK5998-3GS00-2AC2) (All versions < V4.0). Affected devices do not properly limit the scope of files accessible through and the privileges of the SFTP functionality. This could allow an authenticated highly-privileged remote attacker to read and write arbitrary files.

The advisory is shared at cert-portal.siemens.com. This vulnerability is uniquely identified as CVE-2025-27395 since 02/24/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. The exploitation needs additional levels of successful authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/22/2025). MITRE ATT&CK project uses the attack technique T1006 for this issue.

Upgrading to version 4.0 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• Siemens

Name

• SCALANCE LPE9403

Version

• 3.x

License

• commercial

Website

• Vendor: https://www.siemens.com/

CPE 2.3info

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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