vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2019-5637

Beckhoff TwinCAT Profinet Driver Divide-by-Zero Denial of Service

HIGH
7.5
CVSS Score
Published: November 21, 2019 at 07:16 PM UTC
Updated: June 17, 2026 at 02:38 AM UTC
5 products affected across 1 vendorTwincatTwincat Cx2030Twincat Cx5140

Using TwinCAT 2 by Beckhoff?

Get instant alerts when new vulnerabilities affect TwinCAT 2 - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
HIGH7.5
Exploit prediction
EPSS 1%

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).

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Twincat· Beckhoff
95%
3.1.4022.293.1.4022.30
beckhoff-twincat-cx2030 (same device) · beckhoff-twincat-cx5140 (same device)
TwinCAT 2· Beckhoff
60%
2304
TwinCAT 3· Beckhoff
60%
4204.0
Twincat Cx2030· Beckhoffdevice
80%
All versions
Twincat Cx5140· Beckhoffdevice
80%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://blog.rapid7.com/2019/10/08/r7-2019-32-denial-of-service-vulnerabilities-in-beckhoff-twincat-plc-environment-fixed/
x_refsource_CONFIRMMitigationVendor Advisory
Source: [email protected]
https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2019-007.pdf

CVSS

7.5HIGHrapid7
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-369

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card