Description
An exploitable denial-of-service vulnerability exists in the iocheckd service "I/O-Check" functionality of WAGO PFC 200 Firmware versions 03.01.07(13) and 03.00.39(12), and WAGO PFC100 Firmware version 03.00.39(12). 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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | WAGO PFC200 | Firmware version 03.01.07(13), Firmware version 03.00.39(12) | — |
| — | WAGO PFC100 | Firmware version 03.00.39(12) | — |
Advisories 2
- VDE-2025-080 WAGO: Multiple Vulnerabilities in I/O-Check Service CERT@VDE · Sep 9, 2025
- ICSA-20-065-01 WAGO I/O-CHECK CISA ICS & IT advisories · Mar 5, 2020