Path Traversal in Schneider Electric UPS Manager REST API 'upssleep' Endpoint
CVE-2026-2399 Published on April 14, 2026
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.
Weakness Type
What is a Directory traversal Vulnerability?
The software 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 software 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.
CVE-2026-2399 has been classified to as a Directory traversal vulnerability or weakness.
Affected Versions
Schneider Electric PowerChute™ Serial Shutdown Version Versions 1.4 and prior is affected by CVE-2026-2399Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.