Voltronic Power SNMP Web Pro version 1.1 contains a pre-authentication path traversal vulnerability in the upload.cgi endpoint. An unauthenticated attacker can supply directory traversal strings in the params parameter to read arbitrary files from the device’s filesystem. By obtaining files containing password hashes, an attacker can later perform offline cracking to gain root-level privilege and fully compromise the device. This weakness is classified as CWE-22.

The vulnerable product is Voltronic Power SNMP Web Pro, version 1.1. No other versions are listed in the advisory, so only this release is confirmed affected. The vulnerability impacts devices running this firmware and is exploitable by any party that can reach the upload.cgi endpoint over the network.

The CVSS score of 8.7 indicates high severity. The EPSS score of less than 1% suggests a low probability of exploitation at scale, and the vulnerability is not currently catalogued in CISA’s KEV list. Exploitation requires only unauthenticated HTTP requests to upload.cgi, making it trivial for an attacker inside the network to read sensitive configuration or credential files and potentially achieve full system compromise.