CVE-2019-5637

Name: CVE-2019-5637
Creator: NVD / NIST
Published: 2019-11-21T20:15:15.99+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.43%

Last modified Jun 17, 2026

CVE-2019-5637 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. When Beckhoff TwinCAT is configured to use the Profinet driver, a denial of service of the controller could be reached by sending a malformed UDP packet to the device. This issue affects TwinCAT 2 version 2304 (and prior) and TwinCAT 3.1 version 4204.0 (and prior).. EPSS estimates a 1.43% chance of exploitation in the next 30 days.

Description

When Beckhoff TwinCAT is configured to use the Profinet driver, a denial of service of the controller could be reached by sending a malformed UDP packet to the device. This issue affects TwinCAT 2 version 2304 (and prior) and TwinCAT 3.1 version 4204.0 (and prior).

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.43%

69.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Beckhoff	Twincat	3.1.4022.30
Beckhoff	Twincat	3.1.4022.29

References

https://blog.rapid7.com/2019/10/08/r7-2019-32-denial-of-service-vulnerabilities-in-beckhoff-twincat-plc-environment-fixed/Exploit, Third Party Advisory
https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2019-007.pdfMitigation, Vendor Advisory
https://blog.rapid7.com/2019/10/08/r7-2019-32-denial-of-service-vulnerabilities-in-beckhoff-twincat-plc-environment-fixed/Exploit, Third Party Advisory
https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2019-007.pdfMitigation, Vendor Advisory

Timeline

Published: Nov 21, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-5637?

How severe is CVE-2019-5637?

CVE-2019-5637 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.43% probability of exploitation in the next 30 days.

How do I fix CVE-2019-5637?

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-2019-5637?

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

Scan your code now

Source: NVD / NIST