HIGH
CVE-2019-5637
CWE-369Published: November 21, 2019· Updated: Jun 17, 2026
7.5
CVSS v3.1
Official 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).
Technical Analysis
CVE-2019-5637 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Vendors & Products
beckhoff3 product(s)
twincattwincat cx2030twincat cx5140
Source: NVD CPE · 4 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (4)
→
→
https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2019-007.pdfMitigation · Vendor Advisory
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https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2019-007.pdfMitigation · Vendor Advisory
Quick Facts
CVE IDCVE-2019-5637
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-369
CISA KEVNo
Affected1 vendor(s)
PublishedNov 21, 2019
Related CVEs (CWE-369)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2019-5637 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.