CVE-2019-5637 json
Beckhoff TwinCAT Profinet Driver Divide-by-Zero Denial of Service
published 2019-11-21 6 y ago modified 2026-06-17 4 mo ago also EUVD-2019-15212
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.4%
- EPSS 1.4% chance of exploitation in 30 days, percentile 73%
- public exploits
- 0
- none known
Summary
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).
Exploit prediction
1.43% chance of exploitation in the next 30 days, higher than 73% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- blog.rapid7.com https://blog.rapid7.com/2019/10/08/r7-2019-32-denial-of-service-vulnerabilities-in-beckhoff-twincat-plc-environment-fixed/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
Affected products
- Beckhoff TwinCAT 2
- Beckhoff TwinCAT 3.1
Classification
- Weakness
-
- CWE-369 Divide By Zero
References
-
blog.rapid7.com
/2019/10/08/r7-2019-32-denial-of-service-vulnerabilities-in-beckhoff-twincat-plc-environment-fixed/
exploit, third-party-advisory
-
download.beckhoff.com
/download/Document/product-security/Advisories/advisory-2019-007.pdf
mitigation, vendor-advisory
Sources
- CVE List CVE-2019-5637
- NVD CVE-2019-5637
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