CVE-2019-5637

HIGH

Beckhoff TwinCAT 2 < 2304 and TwinCAT 3.1 < 4204.0 - Denial of Service via Malformed UDP Packet

Title source: llm

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).

References (2)

Core 2

Core References

Exploit, Third Party Advisory x_refsource_misc

https://blog.rapid7.com/2019/10/08/r7-2019-32-denial-of-service-vulnerabilities-in-beckhoff-twincat-plc-environment-fixed/

Mitigation, Vendor Advisory x_refsource_confirm

https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2019-007.pdf

Scores

CVSS v3 7.5

EPSS 0.0143

EPSS Percentile 69.4%

Attack Vector NETWORK

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

Details

CWE

CWE-369

Status published

Products (2)

beckhoff/twincat 3.1.4022.30

beckhoff/twincat 3.1.4022.29

Published Nov 21, 2019

Tracked Since Feb 18, 2026