CVE-2019-5074

Name: CVE-2019-5074
Creator: NVD / NIST
Published: 2019-12-18T20:15:16.76+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 3.28%

Last modified Jun 17, 2026

CVE-2019-5074 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An exploitable stack buffer overflow vulnerability exists in the iocheckd service ''I/O-Check'' functionality of WAGO PFC200 Firmware version 03.01.07(13), WAGO PFC200 Firmware version 03.00.39(12) and WAGO PFC100 Firmware version 03.00.39(12). A specially crafted set of packets can cause a stack buffer overflow, resulting in code execution. EPSS estimates a 3.28% chance of exploitation in the next 30 days.

Description

An exploitable stack buffer overflow vulnerability exists in the iocheckd service ''I/O-Check'' functionality of WAGO PFC200 Firmware version 03.01.07(13), WAGO PFC200 Firmware version 03.00.39(12) and WAGO PFC100 Firmware version 03.00.39(12). A specially crafted set of packets can cause a stack buffer overflow, resulting in code execution. An attacker can send unauthenticated packets to trigger this vulnerability.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

3.28%

86.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Wago	Pfc 200 Firmware	03.01.07\(13\)
Wago	Pfc 100 Firmware	03.00.39\(12\)

References

https://talosintelligence.com/vulnerability_reports/TALOS-2019-0863Third Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2019-0863Third Party Advisory

Timeline

Published: Dec 18, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-5074?

How severe is CVE-2019-5074?

CVE-2019-5074 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 3.28% probability of exploitation in the next 30 days.

How do I fix CVE-2019-5074?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-5074?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST