Skip to content
OpenAdvisories
Critical VDE-2025-080 1 CVE

WAGO: Multiple Vulnerabilities in I/O-Check Service

Published Sep 9, 2025 · Updated Sep 9, 2025

Vendor: WAGO Product: 0750-0331 Product: 0750-0332 Product: 0750-0340 Product: 0750-0341 Product: 0750-0342 Product: 0750-0352 Product: 0750-0362 Product: 0750-0363 Product: 0750-0370 Product: 0750-0375 Product: 0750-0377 Product: 0750-0823 Product: 0750-0829 Product: 0750-0831 Product: 0750-0842 Product: 0750-0843 Product: 0750-0852 Product: 0750-0860 Product: 0750-0862 Product: 0750-0863 Product: 0750-0870 Product: 0750-0871 Product: 0750-0872 Product: 0750-0880 Product: 0750-0881 Product: 0750-0882 Product: 0750-0889 Product: 0750-0890 Product: 0750-0891 +15 more

Summary

A missing authentication vulnerability exists in the iocheckd service "I/O-Check" functionality. A single packet can cause a denial of service and weaken credentials resulting in the default documented credentials being applied to the device. An attacker can send an unauthenticated packet to trigger this vulnerability.

Details

Impact
The reported vulnerability enables a remote attacker to send arbitrary commands without authentication. This could result in changes to settings, application deletion, factory resets, code execution, system crashes or denial of service. By using specially crafted IP packets, the attacker can manipulate settings and disrupt the device's basic functions, potentially gaining control of the device.

Mitigation
The I/O-Check service protocol is only needed during installation and commissioning, not during normal operations. It is highly recommended to disable the IP-port 6626 after commissioning.

Vulnerabilities 1

  • Unscored —
    CVE-2019-5080

    An exploitable denial-of-service vulnerability exists in the iocheckd service "I/O-Check" functionality of WAGO PFC 200…

Revision history

  1. #1

    Initial revision.

References