CVE-2019-5073

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2019-12-18 · updated 2026-06-17
Weakness: CWE-200

Description

An exploitable information exposure vulnerability exists in the iocheckd service "I/O-Check" functionality of WAGO PFC200 Firmware versions 03.01.07(13) and 03.00.39(12), and WAGO PFC100 Firmware version 03.00.39(12). A specially crafted set of packets can cause an external tool to fail, resulting in uninitialized stack data to be copied to the response packet buffer. An attacker can send unauthenticated packets to trigger this vulnerability.

Affected products

WAGO Pfc 100 Firmware: 03.00.39(12)
WAGO Pfc 200 Firmware: 03.00.39(12), 03.01.07(13)

References

https://talosintelligence.com/vulnerability_reports/TALOS-2019-0862
https://talosintelligence.com/vulnerability_reports/TALOS-2019-0862

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