CVE-2019-5077

CRITICAL

WAGO PFC 200 and PFC 100 Firmware - Unauthenticated Denial of Service via I/O-Check Service

Title source: llm
STIX 2.1

Description

An exploitable denial-of-service vulnerability exists in the iocheckd service ‘’I/O-Chec’’ functionality of WAGO PFC 200 Firmware versions 03.01.07(13) and 03.00.39(12), and WAGO PFC 100 Firmware version 03.00.39(12). A specially crafted set of packets can cause a denial of service, resulting in the device entering an error state where it ceases all network communications. An attacker can send unauthenticated packets to trigger this vulnerability.

References (1)

Core 1
Core References

Scores

CVSS v3 9.1
EPSS 0.0164
EPSS Percentile 73.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Details

CWE
CWE-306
Status published
Products (3)
wago/pfc_100_firmware 03.00.39\(12\)
wago/pfc_200_firmware 03.00.39\(12\)
wago/pfc_200_firmware 03.01.07\(13\)
Published Dec 18, 2019
Tracked Since Feb 18, 2026