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CVE-2026-44402 – Unauthenticated Root Remote Code Execution – Voltronic Power SNMP Web Pro 1.1

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Summary

CVE-2026-44402 is a critical unauthenticated remote code execution vulnerability in Voltronic Power SNMP Web Pro 1.1, rooted in the firmware update handler at /cgi-bin/upload.cgi. Because the endpoint accepts and extracts attacker-supplied firmware archives without validating their contents or confirming a valid session, a remote, unauthenticated attacker can execute arbitrary commands with root privileges. This results in complete compromise of the affected UPS management device.

Technical details

  • Root cause: /cgi-bin/upload.cgi extracts and installs uploaded tar archives (via params=extract and params=install) without validating archive contents (CWE-434, Unrestricted Upload of File with Dangerous Type).
  • Session/authentication check on the endpoint can be satisfied with any cookie value, including an invalid or manipulated one, rather than a verified session.
  • Attack requires no authentication, no user interaction, and is exploitable over the network with low attack complexity.
  • A crafted archive containing an install script and a CGI script is extracted and installed by the device’s install routine, which runs as root, deploying attacker-controlled code into the web server’s CGI directory for follow-on command execution.
  • Impact: full remote system compromise (root-level command execution) of the SNMP Web Pro management interface, affecting confidentiality, integrity, and availability of the device.

Affected software

  • Voltronic Power SNMP Web Pro, version 1.1

Severity

  • CVSS v3.1: 9.8 (Critical) — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  • CVSS v4.0: 9.3 (Critical) — CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Mitigation and recommended actions

  • Immediate: No vendor-supplied patched firmware version has been confirmed as of publication; contact Voltronic Power for updated firmware for SNMP Web Pro and apply it as soon as it becomes available.
  • Network mitigation: Remove direct internet exposure of the SNMP Web Pro management interface; restrict access to trusted management networks/VPN only.
  • Place an authenticating reverse proxy in front of the device to enforce access control until a vendor fix is applied.
  • Monitor device logs and network traffic for unexpected requests to /cgi-bin/upload.cgi, especially with params=extract or params=install, and for unrecognized CGI files appearing on the device.

How IONIX identifies potentially affected assets

IONIX matches the following signals against data already collected when it crawled the asset; identifying the technology sends no request beyond that crawl.

  • Page title: SNMP Web Server
  • Raw HTTP response body: SNMP Web Pro

References

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IONIX transforms real-world PoCs into safe, non-intrusive test payloads that can be run in production environments without disruption. These simulations are precisely targeted to the systems that are vulnerable, ensuring rapid validation without unnecessary load.

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By combining context about software stack, versioning, exposure status, and reachability, IONIX ensures that only the right payloads are executed against the right assets, maximizing efficiency and minimizing risk.

6

Drive Fast and Actionable Remediation

Results are routed through integrations with ticketing, SOAR, and SIEM tools. Issues are written in plain language, bundled into remediation clusters, and prioritized based on asset criticality, exploitability, and blast radius. This shortens mean time to remediation (MTTR) and empowers teams to act with confidence.

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