Schneider Electric PowerChute Serial Shutdown /REST/upssleep path traversal

Summaryinfo

A vulnerability was found in Schneider Electric PowerChute Serial Shutdown. It has been declared as critical. Affected is an unknown function of the file /REST/upssleep. Such manipulation leads to path traversal. This vulnerability is documented as CVE-2026-2399. The attack requires being on the local network. There is not any exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Schneider Electric PowerChute Serial Shutdown (version now known). Affected by this issue is some unknown processing of the file /REST/upssleep. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to 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. Impacted is integrity, and availability. CVE summarizes:

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability exists that could cause critical files overwritten with text data when a Web Admin user alters the POST /REST/upssleep request payload.

The advisory is shared for download at download.schneider-electric.com. This vulnerability is handled as CVE-2026-2399 since 02/12/2026. The exploitation is known to be easy. Access to the local network is required for this attack to succeed. The exploitation needs additional levels of successful authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1006.

The vulnerability scanner Nessus provides a plugin with the ID 306551 (Schneider Electric PowerChute Serial Shutdown < 1.5 Multiple Vulnerabilities (SEVD-2026-104-01)), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem.

The vulnerability is also documented in the vulnerability database at Tenable (306551). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• SCADA Software

Vendor

• Schneider Electric

Name

• PowerChute Serial Shutdown

License

• commercial

Website

• Vendor: https://www.schneider-electric.com/

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Once again VulDB remains the best source for vulnerability data.

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