CVE-2019-5184: Wago PFC200 Firmware

High severity, CVSS 7.8. EPSS: 0.8% chance of exploitation in the next 30 days.

An exploitable double free vulnerability exists in the iocheckd service "I/O-Check" functionality of WAGO PFC 200. A specially crafted XML cache file written to a specific location on the device can cause a heap pointer to be freed twice, resulting in a denial of service and potentially code execution. An attacker can send a specially crafted packet to trigger the parsing of this cache file.

Affected products

• Wago PFC200 Firmware: version 03.02.02(14) only

Published 2020-03-23. Last modified 2026-06-17.